1920s

WORLD HISTORY · 20TH CENTURY 日本語

Events of the 1920s1920–1929

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What happened in the 1920s?

In the 1920s (1920–1929), the Treaty of Versailles took effect and the League of Nations was launched, and Mussolini began the March on Rome in Italy. Japan suffered the Great Kanto Earthquake, passed a universal male suffrage law, and entered the Showa era, and in 1929 the Great Depression began.

  1. Versailles Treaty takes effect; League of Nations launchedEurope
  2. Mussolini begins the March on RomeEurope
  3. Great Kanto Earthquake strikesAsia
  4. Japan passes General Election LawAsia
  5. Emperor Taisho dies; Showa era beginsAsia
  6. Lindbergh flies across the Atlantic to ParisEurope
  7. Northern Expedition ends; Nationalists unify ChinaAsia
  8. Great Depression beginsNorth America

Summaries are written by the site editors.

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Year by year

The 1920s in AP history courses

AP World HistoryUnit 7 (Global Conflict)
AP U.S. HistoryPeriod 7

Key events of the 1920s (timeline)

Tip: the PC view is best for studying

On a computer, each region has its own vertical line, so you can follow the flow of events and see what was happening in different parts of the world at the same time.

1920Taisho 9

Japan formally joins the League of Nations

Asia

Jan 10, 1920Taisho 9

Versailles Treaty takes effect; League of Nations launched

Europe

Jan 10, 1920Taisho 9

League of Nations founded as treaty takes effect

Europe

Jan 16, 1920Taisho 9

Prohibition takes effect in the United States

North America

Mar 11, 1920Taisho 9

Nikolayevsk Incident occurs in Russia

Europe

Mar 15, 1920Taisho 9

Stock crash triggers Japan's postwar recession

Asia

Apr 20, 1920Taisho 9

Antwerp Olympics open

Europe

Aug 18, 1920Taisho 9

Women win the right to vote in America

North America

Oct 1, 1920Taisho 9

Japan conducts its first national census

Asia

Mar 3, 1921Taisho 10

Crown Prince Hirohito departs on European tour

AsiaEurope

Mar 21, 1921Taisho 10

Russia launches the New Economic Policy

Europe

Jul 23, 1921Taisho 10

Chinese Communist Party founded

Asia

Nov 4, 1921Taisho 10

Prime Minister Hara assassinated at Tokyo Station

Asia

Nov 12, 1921Taisho 10

Washington Naval Conference opens

North America

Nov 13, 1921Taisho 10

Takahashi Korekiyo cabinet takes office

Asia

Nov 25, 1921Taisho 10

Prince Hirohito becomes regent

Asia

Dec 6, 1921Taisho 10

Anglo-Irish Treaty signed

Europe

Feb 6, 1922Taisho 11

Washington Naval Treaty signed

North America

Mar 3, 1922Taisho 11

Suiheisha anti-discrimination movement founded

Asia

Apr 22, 1922Taisho 11

Japan promulgates Health Insurance Act

Asia

Jun 12, 1922Taisho 11

Kato Tomosaburo cabinet takes office

Asia

Jul 15, 1922Taisho 11

Japanese Communist Party founded

Asia

Oct 28, 1922Taisho 11

Mussolini begins the March on Rome

Europe

Oct 28, 1922Taisho 11

Blackshirts begin March on Rome

Europe

Nov 1, 1922Taisho 11

Sultanate abolished, ending the Ottoman Empire

Middle East

Nov 4, 1922Taisho 11

Entrance to Tutankhamun's tomb discovered

Africa

Jan 11, 1923Taisho 12

French and Belgian troops occupy the Ruhr

Europe

Jul 24, 1923Taisho 12

Treaty of Lausanne signed

Middle EastEurope

Aug 17, 1923Taisho 12

Anglo-Japanese Alliance ends as Four-Power Treaty takes effect

AsiaEurope

Sep 1, 1923Taisho 12

Great Kanto Earthquake strikes

Asia

Sep 16, 1923Taisho 12

Amakasu Incident by military police occurs

Asia

Oct 29, 1923Taisho 12

Republic of Turkey founded

Middle East

Nov 8, 1923Taisho 12

Beer Hall Putsch in Munich

Europe

Dec 27, 1923Taisho 12

Toranomon Incident attack on the regent

Asia

Jan 20, 1924Taisho 13

First United Front formed in China

Asia

Jan 22, 1924Taisho 13

Britain gets its first Labour prime minister

Europe

Jan 26, 1924Taisho 13

Crown Prince Hirohito marries Princess Nagako

Asia

May 4, 1924Taisho 13

Paris Olympics open

Europe

May 26, 1924Taisho 13

U.S. passes act barring Japanese immigration

AsiaNorth America

Jun 11, 1924Taisho 13

Kato Takaaki coalition cabinet takes office

Asia

Aug 1, 1924Taisho 13

Koshien Stadium completed

Asia

Aug 16, 1924Taisho 13

Dawes Plan adopted

North AmericaEurope

Jan 3, 1925Taisho 14

Mussolini declares dictatorship

Europe

Jan 20, 1925Taisho 14

Soviet–Japanese Basic Convention concluded

AsiaEurope

Mar 26, 1925Taisho 14

Japan passes General Election Law

Asia

Mar 26, 1925Taisho 14

Universal Manhood Suffrage Law passed

Asia

Apr 22, 1925Taisho 14

Peace Preservation Law promulgated

Asia

May 30, 1925Taisho 14

May Thirtieth Movement erupts in Shanghai

Asia

Jul 12, 1925Taisho 14

Tokyo station begins regular radio broadcasts

Asia

Jul 18, 1925Taisho 14

First volume of Hitler's Mein Kampf published

Europe

Dec 1, 1925Taisho 14

Locarno Treaties signed

Europe

Jan 27, 1926Taisho 15 / Showa 1

Baird gives first public television demonstration

Europe

Mar 16, 1926Taisho 15 / Showa 1

Goddard launches liquid-fueled rocket

North America

May 24, 1926Taisho 15 / Showa 1

Mount Tokachi erupts in Hokkaido

Asia

Jul 1, 1926Taisho 15 / Showa 1

Canton Nationalist government launches Northern Expedition

Asia

Aug 6, 1926Taisho 15 / Showa 1

NHK broadcaster established

Asia

Sep 8, 1926Taisho 15 / Showa 1

Germany joins the League of Nations

Europe

Dec 3, 1926Taisho 15 / Showa 1

Low-cost Japanese literature anthology series launched

Asia

Dec 25, 1926Taisho 15 / Showa 1

Emperor Taisho dies; Showa era begins

Asia

Dec 25, 1926Taisho 15 / Showa 1

Emperor Taisho dies; era renamed Showa

Asia

Kita-Tango earthquake strikes

Asia

Bank closures spread in Showa financial panic

Asia

Nanjing Incident as Nationalist army enters city

Asia

Chiang Kai-shek stages Shanghai coup

Asia

Tanaka Giichi cabinet takes office

Asia

Lindbergh flies across the Atlantic to Paris

Europe

Lindbergh flies solo across the Atlantic

North AmericaEurope

First talking feature film released

North America

Japan's first subway opens

Asia

Japan holds first universal male suffrage election

Asia

March 15 Incident arrests of Communists

Asia

Amsterdam Olympics open

Europe

Jun 4, 1928Showa 3

Zhang Zuolin killed in train bombing

Asia

Northern Expedition forces enter Beijing

Asia

Kellogg–Briand Pact signed

North AmericaEurope

Emperor Showa's enthronement ceremony held

Asia

Northern Expedition ends; Nationalists unify China

Asia

Northeast changes flags, Nationalists unify China

Asia

Jan 31, 1929Showa 4

Stalin expels Trotsky

Europe

Lateran Treaty creates Vatican City

Europe

Former Diet member Yamamoto Senji stabbed to death

Asia

April 16 Incident brings mass Communist arrests

Asia

First Academy Awards ceremony held

North America

Hamaguchi Osachi cabinet takes office

Asia

Graf Zeppelin arrives in Japan

Asia

Oct 24, 1929Showa 4

Great Depression begins

AsiaNorth AmericaEurope

EventNameFamous birthEvent in more than one region

Source: Wikipedia date pages ("January 1" … "December 31") / CC BY-SA 4.0. Regions are assigned by the site editors.

Dates and events are based on Wikipedia and other references. Summaries and regions are written by the site editors.

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