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{{Short description|1918–1939 period between the World Wars}}
{{Redirect|Between the wars|other subjects|Between the Wars (disambiguation)}}
{{Use dmy dates|date=August 2021}}
{{Use British English|date=December 2015}}
{{Missing information|the [[Estado Novo (Portugal)|Estado Novo]] of Portugal established in 1933|date={{monthyear}}}}
[[File:Post WWI Conflict Map In New-York Tribune November 9 1919 Page 26.jpg|thumb|alt=Map of Europe with numbered locations|400px|
The ''[[New-York Tribune]]'' printed this map on 9 November 1919, of the armed conflicts in Central and Eastern Europe in 1919, one year after World War I had ended:<ref>{{cite news |url=https://chroniclingamerica.loc.gov/lccn/sn83030214/1919-11-09/ed-1/seq-26/ |newspaper=New-York Tribune |first=Frank H. |last=Simonds |title=A Year After the Armistice—The Unsettled Disputes |date=9 November 1919 |page=26 |access-date=10 November 2019 |archive-date=9 November 2019 |archive-url=https://web.archive.org/web/20191109153518/https://chroniclingamerica.loc.gov/lccn/sn83030214/1919-11-09/ed-1/seq-26/ |url-status=live }}</ref>
{{Ordered list|[[Baltic_statesBaltic states#The_first_period_of_independenceInterwar period and independence,_1918%E2%80%931940 1918–1940|Baltic States War of Independence]] and [[Russian Civil War]]|[[White movement|White Army]] of [[Nikolai Yudenich|Yudenich]]|[[North Russia intervention]]|White Army of [[Alexander Kolchak|Kolchak: Siberia]]|[[Anton Denikin|Denikin: White Army]]|[[Symon Petliura|Petliura: Ukrainian directorate]]|[[Polish–Soviet War]]|[[Upper Silesia plebiscite|Silesia]] tension between the Poles and Germans.|[[Hungarian–Romanian War|Romanian occupation of Hungary]]|[[Gabriele D'Annunzio]] seizes Fiume, creates the [[Italian Regency of Carnaro]]|[[Albania during World War I|Promiscuous]] fighting in Albania|[[Turkish War of Independence]]
}}]]
[[File:BlankMap-World-1921.png|alt=|thumb|296x296px|Boundaries in 1920]]
TheIn the [[history of the 20th century]], the '''interwar period''' (or '''interbellum''') lasted from 11{{spaces}}November 1918 to 1{{spaces}}September 1939 (20{{spaces}}years, 9{{spaces}}months, 21{{spaces}}days) – from the end of [[World War I]] (WWI) to the beginning of [[World War II]] (WWII). It was relatively short, yet featured many social, political, military, and economic changes throughout the world. Petroleum-based energy production and associated mechanisation led to the prosperous [[Roaring Twenties]], a time of [[social mobility|social]] and [[economic mobility]] for the [[middle class]]. [[Automobile]]s, [[Electric light|electric lighting]], [[radio]], and more became common among populations in the [[developed world|first world]]. The era's indulgences were followed by the [[Great Depression]], an unprecedented worldwide economic downturn that severely damaged many of the world's largest economies.
 
Politically, the era coincided with the rise of [[communism]], starting in Russia with the [[October Revolution]] and [[Russian Civil War]], at the end of World War IWWI, and ended with the rise of [[fascism]], particularly in Germany and Italy. China was in the midst of a half-century of instability and the [[Chinese Civil War]] between the [[Kuomintang]] and the [[Chinese Communist Party]] and many warlords. The empires of [[British Empire|Britain]], [[French colonial empire|France]], and others faced challenges as [[imperialism]] was increasingly viewed negatively and independence movements emerged in many [[Colony|colonies]]; in Europe, after protracted low-level fighting [[Irish War of Independence|most of Ireland became independent.]]
In the [[history of the 20th century]], the '''interwar period''' (or '''interbellum''') lasted from 11{{nbs}}November 1918 to 1{{nbs}}September 1939 (20{{nbs}}years, 9{{nbs}}months, 21{{nbs}}days) – from the end of [[World War I]] to the beginning of [[World War II]].
 
The [[Russian Empire|Russian]], [[Ottoman Empire|Ottoman]], [[Austria-Hungary|Austro-Hungarian]], and [[German Empire]]s were dismantled, with the [[Partition of the Ottoman Empire|Ottoman territories]] and [[German colonial empire|German colonies]] redistributed among the [[Allies of World War I|Allies]], chiefly Britain and France. The western parts of the Russian Empire, [[Estonia]], [[Finland]], [[Latvia]], [[Lithuania]], and [[Second Polish Republic|Poland]] became independent nations in their own right, and [[Bessarabia]] (now [[Moldova]] and parts of [[Ukraine]]) [[Union of Bessarabia with Romania|chose to reunify]] with [[Kingdom of Romania|Romania]].
The interwar period was relatively short, yet featured many social, political, and economic changes throughout the world. Petroleum-based energy production and associated mechanisation led to the prosperous [[Roaring Twenties]], a time of [[social mobility|social]] and [[economic mobility]] for the [[middle class]]. [[Automobile]]s, electric lighting, [[radio]], and more became common among populations in the [[developed world]]. The era's indulgences were followed by the [[Great Depression]], an unprecedented worldwide economic downturn that severely damaged many of the world's largest economies.
 
In Russia, the [[Bolsheviks]] managed to regain control of Belarus and Ukraine, Central Asia, and the Caucasus, forming the [[Soviet Union]]. In the [[Near East]], [[Kingdom of Egypt|Egypt]] and [[Kingdom of Iraq|Iraq]] gained independence. During the [[Great Depression]], countries in [[Latin America]] nationalised many foreign companies (most of which belonged to the [[United States]]) in a bid to strengthen their own economies. The territorial ambitions of the Soviets,<ref>{{cite web|url=https://www.nationalww2museum.org/war/articles/invasion-poland-september-1939|title=Invasion of Poland, September 1939|date=17 October 2023 |publisher=The National WWII Museum|quote="The result was the Molotov-Ribbentrop Pact of August 23 [1939]… the crucial part of the agreement… reshaped the map of Central Europe… Bessarabia, Finland, Estonia, Latvia, and eastern Poland would become part of Stalin’s sphere of influence…"|access-date=2024-06-15|archive-url=https://web.archive.org/web/20240511014822/https://www.nationalww2museum.org/war/articles/invasion-poland-september-1939|archive-date=2024-05-11}}</ref> Japanese, Italians, and Germans led to the expansion of their domains.
Politically, the era coincided with the rise of [[communism]], starting in Russia with the [[October Revolution]] and [[Russian Civil War]], at the end of World War I, and ended with the rise of [[fascism]], particularly in Germany and Italy. China was in the midst of a half-century of instability and the [[Chinese Civil War]] between the [[Kuomintang]] and the [[Chinese Communist Party]]. The empires of [[British Empire|Britain]], [[French colonial empire|France]], and others faced challenges as [[imperialism]] was increasingly viewed negatively and independence movements emerged in many colonies; in Europe, after protracted low-level fighting [[Irish War of Independence|most of Ireland became independent.]]
 
The [[Russian Empire|Russian]], [[Ottoman Empire|Ottoman]], [[Austria-Hungary|Austro-Hungarian]], and [[German Empire]]s were dismantled, with the [[Partition of the Ottoman Empire|Ottoman territories]] and [[German colonial empire|German colonies]] redistributed among the [[Allies of World War I|Allies]], chiefly Britain and France. The western parts of the Russian Empire, [[Estonia]], [[Finland]], [[Latvia]], [[Lithuania]], and [[Second Polish Republic|Poland]] became independent nations in their own right, and [[Bessarabia]] (now [[Moldova]] and parts of [[Ukraine]]) [[Union of Bessarabia with Romania|chose to reunify]] with [[Kingdom of Romania|Romania]].
 
Militarily, the period would see a markedly rapid advance in technology which, alongside lessons learned from WWI, would catalyze new strategic and tactical innovations.<ref>{{cite web | url=https://www.britannica.com/technology/military-aircraft/Interwar-developments | title=Military aircraft - Interwar, Developments, Technology &#124; Britannica | date=24 June 2024 }}</ref> While the period would largely see a continuation of the development of the technologies pioneered in WWI, debates emerged as to the most effective use of these advancements.<ref>{{cite web | url=https://thestrategybridge.org/the-bridge/2018/2/28/interwar-airpower-grand-strategy-and-military-innovation-germany-vs-great-britain | title=Interwar Airpower, Grand Strategy, and Military Innovation: Germany vs. Great Britain | date=28 February 2018 }}</ref> On land, discussions focused on how [[armoured warfare|armoured]], [[mechanized infantry|mechanized]], and [[motorized infantry|motorized]] forces should be employed, particularly in-relation to the 'traditional' branches of the [[infantry|regular infantry]], [[horse cavalry]], and [[artillery]].<ref>{{cite book | chapter-url=https://www.cambridge.org/core/books/abs/military-innovation-in-the-interwar-period/armored-warfare-the-british-french-and-german-experiences/03DE45DCEB84DDD97B199F782B94A04C | doi=10.1017/CBO9780511601019.002 | chapter=Armored warfare: The British, French, and German experiences | title=Military Innovation in the Interwar Period | date=1996 | last1=Murray | first1=Williamson | pages=6–49 | isbn=978-0-521-55241-7 }}</ref><ref>{{cite thesis|url=https://dspace.mit.edu/bitstream/handle/1721.1/33688/64634986-MIT.pdf?sequence=2|title=Innovation, Wargaming, and the Development of Armored Warfare|first=Daniel S.|last=Carter|date=June 2005|degree=M. Poli. Sci.|publisher=Massachusetts Institute of Technology}}</ref> In the air, the question of allocating [[air forces]] to [[strategic bombing]] versus dedicating such forces to frontline [[close air support]] was the primary contention, with some arguing that [[interceptor aircraft|interceptor]] development was outpacing [[bombers]], and others maintaining that "[[the bomber will always get through]]." In the [[navy|naval]] sphere, the primary question was whether [[battleships]] would maintain their dominance of the seas or be rendered virtually obsolete by [[naval aviation]].<ref>{{cite web|url=https://www.usni.org/magazines/naval-history-magazine/2019/december/incubate-innovation-aviation-lessons-interwar-period | title=Incubate Innovation: Aviation Lessons from the Interwar Period}}</ref><ref>{{cite web|url=https://www.usni.org/magazines/proceedings/1998/february/innovation-interwar-years | title=Innovation for the Interwar Years}}</ref>
In Russia, the [[Bolsheviks]] managed to regain control of Belarus and Ukraine, Central Asia, and the Caucasus, forming the [[Soviet Union]]. In the [[Near East]], [[Kingdom of Egypt|Egypt]] and [[Kingdom of Iraq|Iraq]] gained independence. During the [[Great Depression]], countries in [[Latin America]] nationalised many foreign companies (most of which belonged to the [[United States]]) in a bid to strengthen their own economies. The territorial ambitions of the Soviets, Japanese, Italians, and Germans led to the expansion of their domains.
The military deliberations and controversies characteristic of the interwar period would ultimately find resolution via the events of WWII,<ref>{{cite web|url=https://www.nationalww2museum.org/war/articles/great-debate |title=The Great Debate }}</ref> which served as a foundation for many of the tenets, [[military doctrine|doctrines]], and strategies of [[modern warfare]].<ref>{{cite web|url=https://today.usc.edu/impact-of-world-war-i-shaping-the-modern-world/ |title=How did WWI reshape the modern world? |date=9 November 2018 }}</ref> Overall, the innovations of WWI and the interwar period would see a shift away from 'traditional' [[Line of battle|line-]] and [[front line|front-based warfare]] and towards a significantly more mobile, mechanized, and [[asymmetric warfare|asymmetric]] form of combat.
 
== Turmoil in Europe ==
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Most independent countries enacted [[women's suffrage]] in the interwar era, including [[Women's suffrage in Canada|Canada]] in 1917 (though [[Quebec]] held out longer), [[Women's suffrage in the United Kingdom|Britain]] in 1918, and the [[Women's suffrage in the United States|United States]] in 1920. There were a few major countries that held out until after the Second World War (such as France, Switzerland, and Portugal).<ref>{{cite book|author1=Garrick Bailey|author2=James Peoples|title=Essentials of Cultural Anthropology|url=https://books.google.com/books?id=7VcWAAAAQBAJ&pg=PA208|year=2013|publisher=Cengage Learning|page=208|isbn=978-1285415550|access-date=19 February 2017|archive-date=19 February 2017|archive-url=https://web.archive.org/web/20170219181638/https://books.google.com/books?id=7VcWAAAAQBAJ&pg=PA208|url-status=live}}</ref> [[Leslie Hume]] argues:
: {{blockquote|The women's contribution to the war effort combined with failures of the previous systems' of Government made it more difficult than hitherto to maintain that women were, both by constitution and temperament, unfit to vote. If women could work in munitions factories, it seemed both ungrateful and illogical to deny them a place in the polling booth. But the vote was much more than simply a reward for war work; the point was that women's participation in the war helped to dispel the fears that surrounded women's entry into the public arena.<ref>{{cite book|author=Leslie Hume|title=The National Union of Women's Suffrage Societies 1897–1914|url=https://books.google.com/books?id=K1TlCwAAQBAJ&pg=PT281|year=2016|publisher=Routledge|page=281|isbn=9781317213260|access-date=19 February 2017|archive-date=19 February 2017|archive-url=https://web.archive.org/web/20170219180620/https://books.google.com/books?id=K1TlCwAAQBAJ&pg=PT281|url-status=live}}</ref>}}
 
In Europe, according to Derek Aldcroft and Steven Morewood, "Nearly all countries registered some economic progress in the 1920s and most of them managed to regain or surpass their pre-war income and production levels by the end of the decade." The Netherlands, Norway, Sweden, Switzerland, and Greece did especially well, while Eastern Europe did poorly, due to the First World War and [[Russian Civil War]].<ref>{{cite book|author1=Derek Howard Aldcroft|author2=Steven Morewood|title=The European Economy Since 1914|url=https://books.google.com/books?id=s3tlP_6nKCcC&pg=PA44|year=2013|publisher=Routledge|pages=44, 46|isbn=9780415438896|access-date=19 February 2017|archive-date=19 February 2017|archive-url=https://web.archive.org/web/20170219175316/https://books.google.com/books?id=s3tlP_6nKCcC&pg=PA44|url-status=live}}</ref> In advanced economies the prosperity reached [[middle class]] households and many in the [[working class]] with [[radio]], [[Car|automobiles]], [[telephone]]s, and [[electric light]]ing and [[Home appliance|appliances]]. There was unprecedented industrial growth, accelerated consumer demand and aspirations, and significant changes in lifestyle and culture. The media began to focus on celebrities, especially sports heroes and movie stars. Major cities built large sports stadiums for the fans, in addition to palatial cinemas. The [[Mechanised agriculture|mechanisation of agriculture]] continued apace, producing an expansion of output that lowered prices, and made many farm workers redundant. Often they moved to nearby industrial towns and cities.
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[[Italian fascism|Fascism]] took control of the [[Kingdom of Italy]] in 1922; as the Great Depression worsened, [[Nazism]] emerged victorious in Germany, fascism spread to many other countries in Europe, and also played a major role in several countries in Latin America.<ref>{{cite book |first=Stanley G. |last=Payne |title=A History of Fascism, 1914–1945 |location=Madison |publisher=University of Wisconsin Press |year=1995 |isbn=0-299-14870-X }}</ref> Fascist parties sprang up, attuned to local right-wing traditions, but also possessing common features that typically included extreme militaristic nationalism, a desire for economic self-containment, threats and aggression toward neighbouring countries, oppression of minorities, a ridicule of democracy while using its techniques to mobilise an angry middle-class base, and a disgust with [[cultural liberalism]]. Fascists believed in power, violence, male superiority, and a "natural" hierarchy, often led by dictators such as [[Benito Mussolini]] or [[Adolf Hitler]]. Fascism in power meant that liberalism and human rights were discarded, and individual pursuits and values were subordinated to what the party decided was best.<ref>{{cite book |first=Robert |last=Soucy |chapter=Fascism |chapter-url=https://www.britannica.com/topic/fascism/Common-characteristics-of-fascist-movements |title=Encyclopaedia Britannica |year=2015 |access-date=2 December 2017 |archive-date=25 October 2018 |archive-url=https://web.archive.org/web/20181025142743/https://www.britannica.com/topic/fascism/Common-characteristics-of-fascist-movements |url-status=live }}</ref>
 
== Empire of Japan ==
{{Main|Empire of Japan|Japanese colonial empire|List of territories occupied by Imperial Japan|Statism in Shōwa Japan}}
[[File:Pacific Area - The Imperial Powers 1939 - Map.svg|thumb|Political map of the Asia-Pacific region, 1939]]
 
The Japanese modelled their [[Economy of Japan|industrial economy]] closely on the most advanced Western European models. They started with textiles, railways, and shipping, expanding to electricity and machinery. The most serious weakness was a shortage of raw materials. Industry ran short of copper, and coal became a net importer. A deep flaw in the aggressive military strategy was a heavy dependence on imports including 100 per cent of the aluminium, 85 per cent of the iron ore, and especially 79 per cent of the oil supplies. It was one thing to go to war with China or Russia, but quite another to be in conflict with the key suppliers, especially the United States, Britain, and the Netherlands, of oil and iron.<ref name="FairbankReischauerCraig">{{cite book |first1=John K. |last1=Fairbank |first2=Edwin O. |last2=Reischauer |first3=Albert M. |last3=Craig |title=East Asia: The Modern Transformation |location=Boston |publisher=Houghton Mifflin |year=1965 |pages=501–4 |oclc=13613258 }}</ref>
 
Japan joined the [[Allies of World War I|Allies of the First World War]] to make territorial gains. Together with the British Empire, it divided up Germany's territories scattered in the Pacific and on the [[Coastline of China|Chinese coast]]; they did not amount to very much. The other Allies pushed back hard against Japan's efforts to dominate China through the [[Twenty-One Demands]] of 1915. Its [[Japanese intervention in Siberia|occupation of Siberia]] proved unproductive. Japan's wartime diplomacy and limited military action had produced few results, and at the Paris Versailles peace conference at the end of the war, Japan was frustrated in its ambitions. At the [[Paris Peace Conference (1919–1920)|Paris Peace Conference]] in 1919, its [[Racial Equality Proposal]] led to increasing diplomatic isolation. The 1902 alliance with Britain was not renewed in 1922 because of heavy pressure on Britain from Canada and the United States. In the 1920s Japanese diplomacy was rooted in a largely liberal democratic political system, and favoured internationalism. By 1930, however, Japan was rapidly reversing itself, rejecting democracy at home, as the Army seized more and more power, and rejecting internationalism and liberalism. By the late 1930s it had joined the Axis military alliance with Nazi Germany and Fascist Italy.<ref name="FairbankReischauerCraig" />{{rp|563–612, 666}}
 
In 1930, the London disarmament conference angered the [[Imperial Japanese Armed Forces]]. The [[Imperial Japanese Navy]] demanded parity with the United States, Britain and France, but was rejected and the conference kept the 1921 ratios. Japan was required to scrap a [[capital ship]]. Extremists assassinated Japanese Prime Minister [[Inukai Tsuyoshi]] in the [[May 15 Incident]] and the military took more power, leading to rapid [[democratic backsliding]].<ref>{{cite book|author=Paul W. Doerr|title=British Foreign Policy, 1919–1939|url=https://books.google.com/books?id=Zumqs15aTfwC&pg=PA120|year=1998|page=120|publisher=Manchester University Press |isbn=9780719046728|access-date=16 March 2018|archive-date=17 November 2019|archive-url=https://web.archive.org/web/20191117110339/https://books.google.com/books?id=Zumqs15aTfwC&pg=PA120|url-status=live}}</ref>
[[File:Zhang Xueliang and Chiang Kai-shek.jpg|thumb|Zhang Xueliang with [[Chiang Kai-shek]] in November 1930.]]
 
==== Japan seizes Manchuria ====
{{Main|Japanese invasion of Manchuria}}
 
In September 1931, the Japanese [[Kwantung Army]]—acting on its own without government approval—[[Japanese invasion of Manchuria|seized control of Manchuria]], an anarchic area thatin northeastern China hadthat notwas controlled inby the powerful warlord [[Zhang decadesXueliang]]. It created the puppet government of [[Manchukuo]]. Britain and France effectively controlled the League of Nations, which issued the [[Lytton Report]] in 1932, saying that Japan had genuine grievances, but it acted illegally in seizing the entire province. Japan quit the League, and Britain and France took no action. US Secretary of State [[Henry L. Stimson]] announced that the United States would also not recognise Japan's conquest as legitimate. Germany welcomed Japan's actions.<ref>{{cite journal |first=David Wen-wei |last=Chang |title=The Western Powers and Japan's Aggression in China: The League of Nations and 'The Lytton Report' |journal=American Journal of Chinese Studies |year=2003 |volume=10 |issue=1 |pages=43–63 |jstor=44288722 }}</ref><ref>{{cite book |first=Shin'ichi |last=Yamamuro |title=Manchuria under Japanese Dominion |publisher=U. of Pennsylvania Press |year=2006 |postscript=; }} online {{cite journal |title=Review |journal=Journal of Japanese Studies |volume=34 |issue=1 |year=2007 |pages=109–114 |doi=10.1353/jjs.2008.0027 |s2cid=146638943 }}</ref>
 
==== Towards the conquest of China ====
{{Main|Second Sino-Japanese War}}
[[File:First pictures of the Japanese occupation of Peiping in China.jpg|thumb|right|Japanese march into [[Zhengyangmen]] of Beijing after capturing the city in July 1937]]
 
The civilian government in Tokyo tried to minimise the Army's aggression in Manchuria, and announced it was withdrawing. On the contrary, the Army completed the conquest of Manchuria, and the civilian cabinet resigned. The political parties were divided on the issue of military expansion. Prime Minister Tsuyoshi tried to negotiate with China but was assassinated in the May 15 Incident in 1932, which ushered in an era of [[Japanese nationalism|nationalism]] and [[Japanese militarism|militarism]] led by the [[Imperial Japanese Army]] and supported by other right-wing societies. The IJA's nationalism ended civilian rule in Japan until after 1945.<ref>{{cite book |first=James L. |last=Huffman |title=Modern Japan: An Encyclopedia of History, Culture, and Nationalism |url=https://books.google.com/books?id=YWLhAQAAQBAJ&pg=PA143 |year=2013 |page=143 |publisher=Routledge |isbn=978-1-135-63490-2 |access-date=16 March 2018 |archive-date=13 December 2019 |archive-url=https://web.archive.org/web/20191213140338/https://books.google.com/books?id=YWLhAQAAQBAJ&pg=PA143 |url-status=live }}</ref>
 
The Army, however, was itself divided into cliques and factions with different strategic viewpoints. One faction viewed the Soviet Union as the main enemy; the other sought to build a mighty empire based in Manchuria and northern China. The Navy, while smaller and less influential, was also factionalised. Large-scale warfare, known as the [[Second Sino-Japanese War]], began in August 1937, with [[Battle of Shanghai|naval and infantry attacks focused on Shanghai]], which quickly spread to other major cities. There were numerous [[Japanese war crimes|large-scale atrocities]] against Chinese civilians, such as the [[Nanjing massacre]] in December 1937, with mass murder and mass rape. By 1939 military lines had stabilised, with Japan in control of almost all of the major Chinese cities and industrial areas. A puppet government was set up.<ref name="FairbankReischauerCraig" />{{rp|589–613}} In the U.S., government and public opinion—even including those who were isolationist regarding Europe—was resolutely opposed to Japan and gave strong support to China. Meanwhile, the Japanese Army fared badly in large battles with the [[Red Army|Soviet Red Army]] in Mongolia at the [[Battles of Khalkhin Gol]] in summer 1939. The USSR was too powerful. Tokyo and Moscow [[Soviet–Japanese Neutrality Pact|signed a nonaggression treaty in April 1941]], as the militarists turned their attention to the European colonies to the south which had urgently-needed oil fields.<ref>{{cite book |first=Herbert |last=Feis |title=The Road to Pearl Harbor: The Coming of the War Between the United States and Japan |publisher=Princeton University Press |year=1960 |pages=8–150 |oclc=394264 }}</ref>
 
== Spain ==
{{Main|Second Spanish Republic|Francoist Spain}}
 
=== Spanish Civil War (1936–1939) ===
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The Spanish Civil War was marked by numerous small battles and sieges, and many atrocities, until the Nationalists won in 1939 by overwhelming the Republican forces. The Soviet Union provided armaments but never enough to equip the heterogeneous government militias and the "[[International Brigades]]" of outside [[Far-left politics|far-left]] volunteers. The civil war did not escalate into a larger conflict, but did become a worldwide ideological battleground that pitted all the [[Communism|Communists]] and many [[Socialism|socialists]] and [[Liberalism|liberals]] against [[Catholic Church|Catholics]], conservatives and fascists. Worldwide there was a decline in [[pacifism]] and a growing sense that another [[world war]] was imminent, and that it would be worth fighting for.<ref>{{cite book |first=E. H. |last=Carr |title=The Comintern and the Spanish Civil War |location=London |publisher=Macmillan |year=1984 |isbn=0-394-53550-2 }}</ref><ref>{{cite book |first=Robert H. |last=Whealey |title=Hitler and Spain: The Nazi Role in the Spanish Civil War, 1936-1939 |year=2005 |publisher=University Press of Kentucky |isbn=0-8131-9139-4 }}</ref>
 
== Great Britain and British Empire ==
{{Main|Interwar Britain}}
[[File:British Empire 1921.png|thumb|upright=1.8|The Second British Empire at its territorial peak in 1921]]
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[[File:ImperialConference.jpg|thumb|[[George V]] with the British and Dominion prime ministers at the [[1926 Imperial Conference]]]]
 
[[British Raj|India]] strongly supported the Empire in the First World War. It expected a reward, but failed to get [[self-government]] as the government was still kept in control of British hands and feared another rebellion like [[Indian Rebellion of 1857|that of 1857]]. The [[Government of India Act 1919]] failed to satisfy demand for self-rule. Mounting tension, particularly in the [[Punjab region]], culminated in the [[Jallianwala Bagh massacre|Amritsar Massacre]] in 1919. [[Indian nationalism]] surged and centred in the [[Indian National Congress|Congress Party]] led by [[Mahatma Gandhi|Mohandas Gandhi]].<ref>{{cite book |first1=Donald Anthony |last1=Low |first2=Rajat Kanta |last2=Ray |title=Congress and the Raj: Facets of the Indian Struggle, 1917–47 |publisher=Oxford UP |year=2006 |isbn=0-19-568367-6 }}</ref> In Britain, public opinion was divided over the morality of the massacre between those who saw it as having saved India from anarchy and those who viewed it with revulsion.<ref>{{cite journal |first=Derek |last=Sayer |title=British reaction to the Amritsar massacre 1919–1920 |journal=Past & Present |volumeissue=131 |issue=1 |year=1991 |pages=130–64 |doi=10.1093/past/131.1.130 }}</ref><ref name="Mowat 12">{{Cite book |last1=Mowat |first1=C. L. | author-link = C. L. Mowat |title=The New Cambridge Modern History, Vol. 12: The Shifting Balance of World Forces, 1898–1945 |url=https://archive.org/stream/iB_CMH/12#page/n3/mode/1up |year=1968 |edition=2nd}} – 25 chapters; 845 pp</ref>
 
Egypt had been under [[History of Egypt under the British|''de facto'' British control]] since the 1880s, despite its nominal ownership by the [[Ottoman Empire]]. In 1922, the [[Kingdom of Egypt]] was granted [[Unilateral Declaration of Egyptian Independence|formal independence]], though it continued to be a [[client state]] following British guidance. Egypt joined the League of Nations. Egypt's [[Fuad I of Egypt|King Fuad]] and his son [[Farouk of Egypt|King Farouk]] and their conservative allies stayed in power with lavish lifestyles thanks to an informal alliance with Britain who would protect them from both secular and Muslim radicalism.<ref>{{cite book |first=Hugh |last=McLeave |title=The Last Pharaoh: Farouk of Egypt |location=New York |publisher=McCall |year=1970 |isbn=0-8415-0020-7 }}</ref> [[Mandatory Iraq]], a British [[League of Nations mandate|mandate]] since 1920, gained official independence as the [[Kingdom of Iraq]] in 1932 when [[Faisal I of Iraq|King Faisal]] agreed to British terms of a military alliance and an assured flow of oil.<ref>{{cite book |first=Gerald |last=De Gaury |title=Three Kings in Baghdad, 1921–1958 |location=London |publisher=Hutchinson |year=1961 |oclc=399044 }}</ref><ref>{{Cite book |last1=Bulliet |first1=Richard |others=et al. |title=The Earth and Its Peoples: A Global History. Vol. 2: Since 1500 |year=2010 |publisher=Cengage Learning |edition=5th ed Cengage Learning |isbn=978-1439084755}} excerpt pp. 774–845</ref>
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In [[Mandatory Palestine|Palestine]], Britain was presented with the problem of mediating between the [[Palestinians|Palestinian Arabs]] and increasing numbers of [[Yishuv|Jewish settlers]]. The [[Balfour Declaration]], which had been incorporated into the terms of the mandate, stated that a national home for the [[Jews|Jewish people]] would be established in Palestine, and Jewish immigration allowed up to a limit that would be determined by the mandatory power. This led to increasing conflict with the Arab population, who openly [[1936–39 Arab revolt in Palestine|revolted in 1936]]. As the threat of war with Germany increased during the 1930s, Britain judged the support of Arabs as more important than the establishment of a Jewish homeland, and shifted to a pro-Arab stance, limiting Jewish immigration and in turn triggering a [[Jewish insurgency in Palestine|Jewish insurgency]].<ref name="Mowat 12" />{{rp|269–96}}
 
The Dominions (Canada, Newfoundland, Australia, New Zealand, South Africa and the Irish Free State) were self-governing and gained semi-independence in the World War, while Britain still controlled foreign policy and defence in all except Ireland. The right of the Dominions to set their own foreign policy was recognised in 1923 and formalised by the 1931 [[Statute of Westminster 1931|Statute of Westminster]]. The Irish Free State effectively broke all ties with Britain in 1937, leaving the Commonwealth and becoming an [[Republic of Ireland|independent republic]].<ref name="Mowat 12" />{{rp|373–402}}
 
== French Empire ==
[[File:FrenchEmpire1946.png|upright=1.7535|thumb|The French Empire from 1919 to 1949.]]
[[File:Paris_expo_1937.jpg|upright=1.75|thumb|Place de Varsovie in [[Paris]] during the [[Exposition Internationale des Arts et Techniques dans la Vie Moderne|World Expo]] in 1937 ([[Agfacolor]] photo).]]
{{Main|Interwar France|French colonial empire}}
 
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Hitler came to power in January 1933, and inaugurated an aggressive power designed to give Germany economic and political domination across central Europe. He did not attempt to recover the lost colonies. Until August 1939, the Nazis denounced Communists and the Soviet Union as the greatest enemy, along with the Jews.<ref>Richard J. Evans, ''The Coming of the Third Reich'' (2005) and Evans, ''The Third Reich in Power'' (2006).</ref>
 
[[File:1938 Naka yoshi sangoku.jpg|upright=0.95|thumb|left|A Japanese poster promoting the [[Axis Powers|Axis cooperation]] in 1938.]]
[[File:Polish Army Warsaw 1939.jpg|upright=0.95|thumb|Polish Army soldier holding last remaining part of German bomber [[He-111]] destroyed by Poles over Warsaw when airplane was killing civilians in September 1939 ([[Kodachrome]] photo).]]
 
Hitler's diplomatic strategy in the 1930s was to make seemingly reasonable demands, threatening war if they were not met. When opponents tried to appease him, he accepted the gains that were offered, then went to the next target. That aggressive strategy worked as Germany pulled out of the [[League of Nations]], rejected the [[Versailles Treaty]], and began to rearm. Retaking the [[Territory of the Saar Basin]] in the aftermath of a [[1935 Saar status referendum|plebiscite]] that favoured returning to Germany, [[Remilitarization of the Rhineland|Hitler's Germany remilitarised the Rhineland]], formed the [[Pact of Steel]] alliance with Mussolini's Italy, and sent massive military aid to Franco in the Spanish Civil War. [[Anschluss|Germany seized Austria]], considered to be a German state, in 1938, and [[Occupation of Czechoslovakia (1938–1945)|took over Czechoslovakia]] after the [[Munich Agreement]] with Britain and France. Forming a [[Molotov–Ribbentrop Pact|non-aggression pact]] with the Soviet Union in August 1939, [[Invasion of Poland|Germany invaded Poland]] after Poland's refusal to cede the [[Free City of Danzig]] in September 1939. Britain and France declared war and [[World War II]] began&nbsp;– somewhat sooner than the Nazis expected or were ready for.<ref>Gerhard L. Weinberg, ''Hitler's foreign policy 1933–1939: The road to World War II.'' (2013), Originally published in two volumes.</ref>
 
[[File:Polish Army Warsaw 1939.jpg|upright=0.95|thumb|Polish Army soldier holding last remaining part of a German bomber [[Heinkel He- 111]] destroyedbomber shot down by Poles over Warsaw when airplane was [[Invasion of Poland|killing civilians]] in September 1939 ([[Kodachrome]] photo).]]
After establishing the "[[Axis powers|Rome-Berlin Axis]]" with [[Benito Mussolini]], and signing the [[Anti-Comintern Pact]] with Japan&nbsp;– which was joined by Italy a year later in 1937&nbsp;– Hitler felt able to take the offensive in foreign policy. On 12 March 1938, German troops marched into Austria, where an [[July Putsch|attempted Nazi coup]] had been unsuccessful in 1934. When Austrian-born Hitler entered [[Vienna]], he was greeted by loud cheers. Four weeks later, 99% of Austrians voted in favour of the annexation ([[Anschluss]]) of their country Austria to the [[German Reich (1933-1945)|German Reich]]. After Austria, Hitler turned to [[Czechoslovakia]], where the 3.5&nbsp;million-strong [[Sudeten Germans|Sudeten German]] minority was demanding equal rights and self-government.<ref name="Donald Cameron Watt 1989">Donald Cameron Watt, ''How war came: the immediate origins of the Second World War, 1938–1939'' (1989).</ref><ref name="R.J. Overy, 2014">R.J. Overy, ''The Origins of the Second World War'' (2014).</ref>
 
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== Italy ==
{{Main|Fascist Italy (1922–1943)}}
{{Further|Second Italo-Ethiopian War|Italian invasion of Albania|History of Greece (1923–1940)}}[[File:Italy aims Europe 1936.png|thumb|Ambitions of Fascist Italy in Europe in 1936.<br />Legend:{{Legend|#073A09|Metropolitan Italy and dependent territories;}}{{Legend|#0F7612|[[Client state]]s;}}{{Legend|#083A39|Claimed territories to be annexed;}}{{Legend|#107776|Territories to be transformed into client states.}} [[Albania]], which was a client state, was considered a territory to be annexed.]]
[[File:Impero italiano.svg|thumb|right|Maximum extent of imperial Italy {{legend|#ff0000|Pre-Second World War}}{{legend|#ff00ff|Captured during the Second World War}}]]
 
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In the [[Balkans]], the Fascist regime claimed [[Dalmatia]] and held ambitions over [[Albania]], [[Slovenia]], [[Croatia]], [[Bosnia and Herzegovina]], [[Macedonia (region)|Macedonia]], and [[Greece]] based on the precedent of previous Roman dominance in these regions.<ref name="Robert Bideleux 1998. Pp. 467">{{cite book |first1=Robert |last1=Bideleux |first2=Ian |last2=Jeffries |title=A History of Eastern Europe: Crisis and Change |location=London |publisher=Routledge |year=1998 |page=467 |isbn=0-415-16111-8 }}</ref> Dalmatia and Slovenia were to be directly annexed into Italy while the remainder of the Balkans was to be transformed into Italian client states.<ref>{{cite book |first1=Allan R. |last1=Millett |first2=Williamson |last2=Murray |title=Military Effectiveness |volume=2 |edition=New |location=New York |publisher=Cambridge University Press |year=2010 |page=184 }}</ref> The regime also sought to establish protective patron-client relationships with [[Austria]], [[Hungary]], [[Kingdom of Romania|Romania]], and [[Bulgaria]].<ref name="Robert Bideleux 1998. Pp. 467"/>
 
In both 1932 and 1935, Italy demanded a [[League of Nations mandate]] of the former [[German colonial empire|German Cameroon]] and a free hand in the [[Ethiopian Empire]] from France in return for Italian support against Germany in the [[Stresa Front]].<ref name="burgwyn">{{cite book |last=Burgwyn |first=James H. |year=1997 |title=Italian Foreign Policy in the Interwar Period, 1918–1940 |isbn=978-0-275-94877-1 |url=https://books.google.com/books?id=PNHxISN-dmQC&pg=PA68 |page=68 |publisher=Praeger |access-date=24 May 2017 |archive-date=9 December 2019 |archive-url=https://web.archive.org/web/20191209191350/https://books.google.com/books?id=PNHxISN-dmQC&pg=PA68 |url-status=live }}</ref> This was refused by French Prime Minister [[Édouard Herriot]], who was not yet sufficiently worried about the prospect of a German resurgence.<ref name="burgwyn"/> The failed resolution of the [[Abyssinia Crisis]] led to the [[Second Italo-Ethiopian War]], in which Italy annexed Ethiopia to its empire.{{factcitation needed|date=April 2022}}
 
Italy's stance towards Spain shifted between the 1920s and the 1930s. The Fascist regime in the 1920s held deep antagonism towards Spain due to [[Miguel Primo de Rivera]]'s pro-French foreign policy. In 1926, Mussolini began aiding the [[Catalan separatism|Catalan separatist movement]], which was led by [[Francesc Macià]], against the Spanish government.<ref name="Robert H. Whealey 2005. P. 11">{{cite book |first=Robert H. |last=Whealey |title=Hitler And Spain: The Nazi Role In The Spanish Civil War, 1936–1939 |edition=Paperback |location=Lexington |publisher=University Press of Kentucky |year=2005 |page=11 |isbn=0-8131-9139-4 }}</ref> With the rise of the left-wing Republican government replacing the [[Monarchy of Spain|Spanish monarchy]], Spanish monarchists and fascists repeatedly approached Italy for aid in overthrowing the Republican government, in which Italy agreed to support them to establish a pro-Italian government in Spain.<ref name="Robert H. Whealey 2005. P. 11"/> In July 1936, [[Francisco Franco]] of the Nationalist faction in the [[Spanish Civil War]] requested Italian support against the ruling Republican faction, and guaranteed that, if Italy supported the Nationalists, "future relations would be more than friendly" and that Italian support "would have permitted the influence of Rome to prevail over that of Berlin in the future politics of Spain".<ref>{{cite book |first1=Sebastian |last1=Balfour |first2=Paul |last2=Preston |title=Spain and the Great Powers in the Twentieth Century |location=London |publisher=Routledge |year=1999 |page=152 |isbn=0-415-18078-3 }}</ref> Italy intervened in the civil war with the intention of occupying the [[Balearic Islands]] and creating a [[client state]] in Spain.<ref>{{cite book |first=R. J. B. |last=Bosworth |title=The Oxford Handbook of Fascism |location=Oxford |publisher=Oxford University Press |year=2009 |page=246 }}</ref> Italy sought the control of the Balearic Islands due to its strategic position—Italy could use the islands as a base to disrupt the lines of communication between France and its [[French North Africa|North African colonies]] and between [[Gibraltar|British Gibraltar]] and [[Crown Colony of Malta|Malta]].<ref>{{cite book |first=John J. |last=Mearsheimer |title=The Tragedy of Great Power Politics |publisher=W. W. Norton & Company |year=2003 |isbn=0-393-32396-X }}</ref> After the victory by Franco and the Nationalists in the war, Allied intelligence was informed that Italy was pressuring Spain to permit an Italian occupation of the [[Balearic Islands]].<ref>{{cite book|title=The Road to Oran: Anglo-Franch Naval Relations, September 1939 – July 1940 |page=24 }}</ref>
Line 150 ⟶ 178:
 
Albanian Prime Minister and President [[Zog I of Albania|Ahmet Zogu]], who had, in 1928, proclaimed himself [[King of Albania]], failed to create a stable state.<ref>{{cite journal |first=Jason |last=Tomes |title=The Throne of Zog |journal=History Today |volume=51 |issue=9 |year=2001 |pages=45–51 }}</ref> Albanian society was deeply divided by religion and language, with a border dispute with Greece and an undeveloped, rural economy. In 1939, Italy [[Italian invasion of Albania|invaded and annexed Albania]] as a separate kingdom in [[personal union]] with the Italian crown. Italy had long built strong links with the Albanian leadership and considered it firmly within its sphere of influence. Mussolini wanted a spectacular success over a smaller neighbour to match Germany's [[Anschluss|annexation of Austria]] and [[Occupation of Czechoslovakia|Czechoslovakia]]. Italian King [[Victor Emmanuel III of Italy|Victor Emmanuel III]] took the [[King of Albania|Albanian crown]], and a [[Italian protectorate of Albania (1939–1943)|fascist government]] under [[Shefqet Vërlaci]] was established.<ref>{{cite book |first=Bernd J. |last=Fischer |title=Albania at War, 1939–1945 |publisher=Purdue UP |year=1999 |isbn=1-55753-141-2 }}</ref>
 
To one degree or another, Spain had been unstable politically for centuries, and in 1936–1939 was wracked by one of the bloodiest civil wars of the 20th century. The real importance comes from outside countries. In Spain the conservative and Catholic elements and the army revolted against the newly elected government, and full-scale civil war erupted. Fascist Italy and Nazi Germany gave munitions and strong military units to the rebel Nationalists, led by General [[Francisco Franco]]. The Republican (or "Loyalist") government, was on the defensive, but it received significant help from the Soviet Union and Mexico. Led by Great Britain and France, and including the United States, most countries remained neutral and refused to provide armaments to either side. The powerful fear was that this localised conflict would escalate into a European conflagration that no one wanted.
 
== Regional patterns ==
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{{Main|Republic of China (1912–1949)|Warlord Era|Nanjing decade|Chinese Civil War}}
{{Empty section|date=May 2022}}
 
=== Japanese dominance in East Asia ===
{{Main|Japanese colonial empire|List of territories occupied by Imperial Japan|Statism in Shōwa Japan}}
[[File:Pacific Area - The Imperial Powers 1939 - Map.svg|thumb|Political map of the Asia-Pacific region, 1939]]
 
The Japanese modelled their [[Economy of Japan|industrial economy]] closely on the most advanced Western European models. They started with textiles, railways, and shipping, expanding to electricity and machinery. The most serious weakness was a shortage of raw materials. Industry ran short of copper, and coal became a net importer. A deep flaw in the aggressive military strategy was a heavy dependence on imports including 100 per cent of the aluminium, 85 per cent of the iron ore, and especially 79 per cent of the oil supplies. It was one thing to go to war with China or Russia, but quite another to be in conflict with the key suppliers, especially the United States, Britain, and the Netherlands, of oil and iron.<ref name="FairbankReischauerCraig">{{cite book |first1=John K. |last1=Fairbank |first2=Edwin O. |last2=Reischauer |first3=Albert M. |last3=Craig |title=East Asia: The Modern Transformation |location=Boston |publisher=Houghton Mifflin |year=1965 |pages=501–4 |oclc=13613258 }}</ref>
 
Japan joined the [[Allies of World War I|Allies of the First World War]] to make territorial gains. Together with the British Empire, it divided up Germany's territories scattered in the Pacific and on the [[Coastline of China|Chinese coast]]; they did not amount to very much. The other Allies pushed back hard against Japan's efforts to dominate China through the [[Twenty-One Demands]] of 1915. Its [[Japanese intervention in Siberia|occupation of Siberia]] proved unproductive. Japan's wartime diplomacy and limited military action had produced few results, and at the Paris Versailles peace conference at the end of the war, Japan was frustrated in its ambitions. At the [[Paris Peace Conference (1919–1920)|Paris Peace Conference]] in 1919, its [[Racial Equality Proposal]] led to increasing diplomatic isolation. The 1902 alliance with Britain was not renewed in 1922 because of heavy pressure on Britain from Canada and the United States. In the 1920s Japanese diplomacy was rooted in a largely liberal democratic political system, and favoured internationalism. By 1930, however, Japan was rapidly reversing itself, rejecting democracy at home, as the Army seized more and more power, and rejecting internationalism and liberalism. By the late 1930s it had joined the Axis military alliance with Nazi Germany and Fascist Italy.<ref name="FairbankReischauerCraig" />{{rp|563–612, 666}}
 
In 1930, the London disarmament conference angered the [[Imperial Japanese Armed Forces]]. The [[Imperial Japanese Navy]] demanded parity with the United States, Britain and France, but was rejected and the conference kept the 1921 ratios. Japan was required to scrap a [[capital ship]]. Extremists assassinated Japanese Prime Minister [[Inukai Tsuyoshi]] in the [[May 15 Incident]] and the military took more power, leading to rapid [[democratic backsliding]].<ref>{{cite book|author=Paul W. Doerr|title=British Foreign Policy, 1919–1939|url=https://books.google.com/books?id=Zumqs15aTfwC&pg=PA120|year=1998|page=120|publisher=Manchester University Press |isbn=9780719046728|access-date=16 March 2018|archive-date=17 November 2019|archive-url=https://web.archive.org/web/20191117110339/https://books.google.com/books?id=Zumqs15aTfwC&pg=PA120|url-status=live}}</ref>
 
==== Japan seizes Manchuria ====
{{Main|Japanese invasion of Manchuria}}
 
In September 1931, the Japanese [[Kwantung Army]]—acting on its own without government approval—[[Japanese invasion of Manchuria|seized control of Manchuria]], an anarchic area that China had not controlled in decades. It created the puppet government of [[Manchukuo]]. Britain and France effectively controlled the League of Nations, which issued the [[Lytton Report]] in 1932, saying that Japan had genuine grievances, but it acted illegally in seizing the entire province. Japan quit the League, and Britain and France took no action. US Secretary of State [[Henry L. Stimson]] announced that the United States would also not recognise Japan's conquest as legitimate. Germany welcomed Japan's actions.<ref>{{cite journal |first=David Wen-wei |last=Chang |title=The Western Powers and Japan's Aggression in China: The League of Nations and 'The Lytton Report' |journal=American Journal of Chinese Studies |year=2003 |volume=10 |issue=1 |pages=43–63 |jstor=44288722 }}</ref><ref>{{cite book |first=Shin'ichi |last=Yamamuro |title=Manchuria under Japanese Dominion |publisher=U. of Pennsylvania Press |year=2006 |postscript=; }} online {{cite journal |title=Review |journal=Journal of Japanese Studies |volume=34 |issue=1 |year=2007 |pages=109–114 |doi=10.1353/jjs.2008.0027 |s2cid=146638943 }}</ref>
 
==== Towards the conquest of China ====
{{Main|Second Sino-Japanese War}}
[[File:First pictures of the Japanese occupation of Peiping in China.jpg|thumb|right|Japanese march into [[Zhengyangmen]] of Beijing after capturing the city in July 1937]]
 
The civilian government in Tokyo tried to minimise the Army's aggression in Manchuria, and announced it was withdrawing. On the contrary, the Army completed the conquest of Manchuria, and the civilian cabinet resigned. The political parties were divided on the issue of military expansion. Prime Minister Tsuyoshi tried to negotiate with China but was assassinated in the May 15 Incident in 1932, which ushered in an era of [[Japanese nationalism|nationalism]] and [[Japanese militarism|militarism]] led by the [[Imperial Japanese Army]] and supported by other right-wing societies. The IJA's nationalism ended civilian rule in Japan until after 1945.<ref>{{cite book |first=James L. |last=Huffman |title=Modern Japan: An Encyclopedia of History, Culture, and Nationalism |url=https://books.google.com/books?id=YWLhAQAAQBAJ&pg=PA143 |year=2013 |page=143 |publisher=Routledge |isbn=978-1-135-63490-2 |access-date=16 March 2018 |archive-date=13 December 2019 |archive-url=https://web.archive.org/web/20191213140338/https://books.google.com/books?id=YWLhAQAAQBAJ&pg=PA143 |url-status=live }}</ref>
 
The Army, however, was itself divided into cliques and factions with different strategic viewpoints. One faction viewed the Soviet Union as the main enemy; the other sought to build a mighty empire based in Manchuria and northern China. The Navy, while smaller and less influential, was also factionalised. Large-scale warfare, known as the [[Second Sino-Japanese War]], began in August 1937, with [[Battle of Shanghai|naval and infantry attacks focused on Shanghai]], which quickly spread to other major cities. There were numerous [[Japanese war crimes|large-scale atrocities]] against Chinese civilians, such as the [[Nanjing massacre]] in December 1937, with mass murder and mass rape. By 1939 military lines had stabilised, with Japan in control of almost all of the major Chinese cities and industrial areas. A puppet government was set up.<ref name="FairbankReischauerCraig" />{{rp|589–613}} In the U.S., government and public opinion—even including those who were isolationist regarding Europe—was resolutely opposed to Japan and gave strong support to China. Meanwhile, the Japanese Army fared badly in large battles with the [[Red Army|Soviet Red Army]] in Mongolia at the [[Battles of Khalkhin Gol]] in summer 1939. The USSR was too powerful. Tokyo and Moscow [[Soviet–Japanese Neutrality Pact|signed a nonaggression treaty in April 1941]], as the militarists turned their attention to the European colonies to the south which had urgently-needed oil fields.<ref>{{cite book |first=Herbert |last=Feis |title=The Road to Pearl Harbor: The Coming of the War Between the United States and Japan |publisher=Princeton University Press |year=1960 |pages=8–150 |oclc=394264 }}</ref>
 
=== Latin America ===
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The contrary ideals of ''[[indigenismo]]'' and ''[[hispanismo]]'' held sway among intellectuals in [[Hispanic America|Spanish-speaking America]] during the interwar period. In Argentina the ''[[gaucho]]'' genre flourished. A rejection of "Western universalist" influences was in vogue across Latin America.<ref name=Goebels/> This last tendency was in part inspired by the translation into Spanish of the book ''[[Decline of the West]]'' in 1923.<ref name=Goebels/>
 
==== Sports ====
Sports became increasingly popular, drawing enthusiastic fans to large stadiums.<ref>{{cite book |editor-first=David M. K. |editor-last=Sheinin |title=Sports Culture in Latin American History |publisher=University of Pittsburgh Press |year=2015 |isbn=978-0-8229-6337-0 }}</ref> The [[International Olympic Committee]] (IOC) worked to encourage Olympic ideals and participation. Following the 1922 Latin American Games in Rio de Janeiro, the IOC helped to establish national Olympic committees and prepare for future competition. In Brazil, however, sporting and political rivalries slowed progress as opposing factions fought for control of [[international sport]]. The [[1924 Summer Olympics]] in Paris and the [[1928 Summer Olympics]] in Amsterdam had greatly increased participation from Latin American athletes.<ref>{{cite journal |first=Cesar R. |last=Torres |title=The Latin American 'Olympic Explosion' of the 1920s: causes and consequences |journal=International Journal of the History of Sport |volume=23 |issue=7 |year=2006 |pages=1088–111 |doi=10.1080/09523360600832320 |s2cid=144085742 }}</ref>
 
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== End of an era ==
The interwar period ended in September 1939 with the [[Nazi Germany|German]] and [[Soviet Union in World War II|Soviet]] [[invasion of Poland]] and the start of [[World War II]].<ref name=Overy-2016>{{cite book |last=Overy |first=R J |author-link=Richard Overy |title=The Inter-war Crisis, 1919–1939 |url=https://books.google.com/books?id=phthPgAACAAJ |edition=2nd revised |year=2015 |publisher=Routledge |location=London, New York |isbn=978-1-1381-379-36 |orig-year=1st pub. 2010:Longman |oclc=949747872 |access-date=11 August 2017 |archive-date=14 December 2019 |archive-url=https://web.archive.org/web/20191214081806/https://books.google.com/books?id=phthPgAACAAJ |url-status=live }}</ref>
 
== See also ==
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== Notes ==
* For a guide to the reliable sources see Jacobson (1983).<ref>Jon Jacobson, "[https://www.jstor.org/stable/1864590 Is there a New International History of the 1920s?.]". ''American Historical Review'' 88.3 (1983): 617–645 [https://www.jstor.org/stable/1864590 online] {{Webarchive|url=https://web.archive.org/web/20201103225109/https://www.jstor.org/stable/1864590 |date=3 November 2020 }}.</ref>
 
== References ==
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== Further reading ==
* Morris, Richard B. and Graham W. Irwin, eds. ''[[iarchive:harperencycloped00morr|Harper Encyclopedia of the Modern World: A Concise Reference History from 1760 to the Present]]'' (1970) [https://archive.org/details/harperencycloped00morr online]
* Albrecht-Carrié, René. ''A Diplomatic History of Europe Since the Congress of Vienna'' (1958), 736pp; a basic introduction, 1815–1955 [https://archive.org/details/diplomatichistor0000albr_b4c1 online free to borrow]
* Berg-Schlosser, Dirk, and Jeremy Mitchell, eds. ''Authoritarianism and democracy in Europe, 1919–39: Comparative Analyses'' (Springer, 2002).
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* Cambon, Jules, ed ''The Foreign Policy of the Powers'' (1935) Essays by experts that cover France, Germany, Great Britain, Italy, Japan, Russia and the United States [https://archive.org/details/in.ernet.dli.2015.130997 Online free]
* Clark, Linda Darus, ed. ''Interwar America: 1920–1940: Primary Sources in U.S. History'' (2001)
* Cohrs, Patrick O. "The First ‘Real’ Peace Settlements after the First World War: Britain, the United States and the Accords of London and Locarno, 1923–1925." ''Contemporary European History'' 12.1 (2003): 1-31.
* Costigliola, Frank C. ''Awkward dominion: American political, economic, and cultural relations with Europe, 1919–1933'' (Cornell University Press, 2018).
 
* Dailey, Andy, and David G. Williamson. (2012) ''Peacemaking, Peacekeeping: International Relations 1918–36'' (2012) 244 pp; textbook, heavily illustrated with diagrams and contemporary photographs and colour posters.
* Doumanis, Nicholas, ed. ''The Oxford Handbook of European History, 1914–1945'' (Oxford UP, 2016).
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* Feinstein, Charles H., Peter Temin, and Gianni Toniolo. ''The World Economy Between the World Wars'' (Oxford UP, 2008), a standard scholarly survey.
* Freeman, Robert. ''The InterWar Years (1919–1939)'' (2014), brief survey
* Frieden, Jeff. "Sectoral conflict and foreign economic policy, 1914–1940". ''International Organization'' 42.1 (1988): 59-90; focus on US policy. {{doi|10.1017/S002081830000713X}}.
* Garraty, John A. '' [[iarchive:greatdepressioni0000garr/page/n7/mode/2up|The Great Depression: An Inquiry into the Causes, Course, and Consequences of the Worldwide Depression of the Nineteen-1930s, As Seen by Contemporaries]]'' (1986).
* Gathorne-Hardy, Geoffrey Malcolm. ''A Short History of International Affairs, 1920 to 1934'' (Oxford UP, 1952).
* {{Cite book |last1=Grenville |first1=J. A. S. |title=[[A History of the World in the 20th Century|A History of the World in the Twentieth Century]] |year=2000 |pages=77–254}} [https://archive.org/search.php?query=creator%3A%28J%20A%20S%20Grenville%29 Online free to borrow]
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* {{cite book|last=Meltzer|first=Allan H.|author-link=Allan H. Meltzer|title=A History of the Federal Reserve – Volume 1: 1913–1951|year=2003|publisher=[[University of Chicago Press]]|place=Chicago|pages=90–545|isbn=978-0226520001}}
* [[Mowat, C. L.]] ed. (1968). ''The New Cambridge Modern History, Vol. 12: The Shifting Balance of World Forces, 1898–1945'' (2nd ed.). – 25 chapters by experts; 845 pp; the first edition (1960) edited by David Thompson has the same title but numerous different chapters.
* Mowat, Charles Loch. ''Britain Between the Wars, 1918–1940'' (1955), 690pp; thorough scholarly coverage; emphasis on politics. {{Webarchive|url=[https://web.archive.org/webdetails/20180624204435britainbetweenwa0000mowa_f7k1/https:page/n8/www.questia.commode/library/705977/britain-between-the-wars-1918-1940 |title=Britain between the Wars, 1918–1940 |author=Charles Loch Mowat|date=24 June 2018 |id =archived exerpt}}; [https://archive.org/details/britainbetweenwa00mowa also1up online free to borrow]
 
* Murray, Williamson and Allan R. Millett, eds. ''Military Innovation in the Interwar Period'' (1998)
* Newman, Sarah, and Matt Houlbrook, eds. ''The Press and Popular Culture in Interwar Europe'' (2015)
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* Seton-Watson, Hugh. (1945) ''Eastern Europe Between The Wars 1918–1941'' (1945) [https://archive.org/download/in.ernet.dli.2015.183358/2015.183358.Estern-Europe-Between-The-Wars-1918-1941.pdf online]
* {{Cite book |last1=Somervell |first1=D.C. |title=The Reign of King George V |url=https://archive.org/details/in.ernet.dli.2015.176466 |year=1936}} – 550 pp; wide-ranging political, social and economic coverage of Britain, 1910–35
* [[Raymond James Sontag|Sontag, Raymond James.]] ''A Broken World, 1919–1939'' (1972) [https://archive.org/details/brokenworld1919100sont online free to borrow]; wide-ranging survey of European history
* [[Raymond James Sontag|Sontag, Raymond James.]] "Between the Wars." ''Pacific Historical Review'' 29.1 (1960): 1–17 [https://www.jstor.org/stable/3636283 online].
* Steiner, Zara. ''The Lights that Failed: European International History 1919–1933''. New York: Oxford University Press, 2008.
* Steiner, Zara. ''The Triumph of the Dark: European International History 1933–1939''. New York: Oxford University Press, 2011.
* Toynbee, A. J. ''Survey of International Affairs 1920–1923'' (1924) [https://archive.org/details/in.ernet.dli.2015.15363 online]; ''Survey of International Affairs'' annual 1920–1937 [https://archive.org/search.php?query=title%3A%28affairs%29%20AND%20creator%3A%28toynbee%29 online]; ''Survey of International Affairs 1924'' (1925); ''Survey of International Affairs 1925'' (1926) [https://archive.org/details/in.ernet.dli.2015.179756 online]; ''Survey of International Affairs 1924'' (1925) [https://archive.org/details/in.ernet.dli.2015.15364 online]; ''Survey of International Affairs 1927'' (1928) [https://archive.org/details/in.ernet.dli.2015.15361 online]; ''Survey of International Affairs 1928'' (1929) [https://archive.org/details/in.ernet.dli.2015.15349 online]; ''Survey of International Affairs 1929'' (1930) [https://archive.org/details/in.ernet.dli.2015.15362 online]; ''Survey of International Affairs 1932'' (1933) [https://archive.org/details/in.ernet.dli.2015.16978 online]; ''Survey of International Affairs 1934'' (1935), focus on Europe, Middle East, Far East; ''Survey of International Affairs 1936'' (1937) [https://archive.org/details/in.ernet.dli.2015.17001 online]
* Watt, D. C. et al., ''A History of the World in the Twentieth Century'' (1968) pp. &nbsp;301–530.
* Wheeler-Bennett, John. ''Munich: Prologue To Tragedy,'' (1948) broad coverage of diplomacy of 1930s
* Zachmann, Urs Matthias. ''Asia after Versailles: Asian Perspectives on the Paris Peace Conference and the Interwar Order, 1919–33'' (2017)
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=== Historiography ===
* Cornelissen, Christoph, and Arndt Weinrich, eds. ''Writing the Great War – The Historiography of World War I from 1918 to the Present'' (2020) free download; full coverage for major countries.
* Jacobson, Jon. "Is there a New International History of the 1920s?.". ''American Historical Review'' 88.3 (1983): 617–645 online.
* [[Raymond James Sontag|Sontag, Raymond James.]] "Between the Wars.". ''Pacific Historical Review'' 29.1 (1960): 1–17, [https://www.jstor.org/stable/{{JSTOR|3636283 online]}}.
 
=== Primary sources ===
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