What happened in 1921

50 events　World 5, Japan 1, North America 6, Europe 22, USSR / Russia 8, Asia 3, Middle East 4, Africa 1

Highlights of 1921

Mar 18WorldThe second Peace of Riga ends the Polish–Soviet War. A permanent border is established between the Polish and Soviet states.
May 1Middle EastJaffa riots: Riots at Jaffa, Mandatory Palestine result in 47 Jewish and 48 Arab deaths.
May 3EuropeThe province of Northern Ireland is created within the United Kingdom.
May 31North AmericaTulsa Race Massacre (Greenwood Massacre): Mobs of white residents attack black residents and businesses in Greenwood District, Tulsa, Oklahoma. The official death toll is 36, but later investigations suggest an actual figure between 100 and 300. 1,250 homes are destroyed and roughly 6,000 African Americans imprisoned in one of the worst incidents of mass racial violence in the United States.
Jul 1AsiaThe Chinese Communist Party (CCP) is founded.
USSR / RussiaSpring – Russian famine of 1921–22 begins; roughly 5,000,000 die.

Mar 12The İstiklâl Marşı (Independence March), the Turkish national anthem, is officially adopted.
Mar 18The second Peace of Riga ends the Polish–Soviet War. A permanent border is established between the Polish and Soviet states.
Mar 31Abkhazia becomes the Socialist Soviet Republic of Abkhazia.
Apr 11The Emirate of Transjordan is created under British Mandate, with Abdullah I as emir.
Nov 11During an Armistice Day ceremony at Arlington National Cemetery, the Tomb of the Unknowns is dedicated by Warren G. Harding, President of the United States.

Dec 13In the Four-Power Treaty on Insular Possessions, the Empire of Japan, United States, United Kingdom, and French Third Republic agree to recognize the status quo in the Pacific.

Jan 21The full-length silent comedy drama film The Kid, written, produced, directed by and starring Charlie Chaplin (in his Tramp character), with Jackie Coogan, is released in the United States.
May 19The Emergency Quota Act is passed by the United States Congress, establishing national quotas on immigration. Because this drastically limits immigration from Eastern Europe, Jews emigrating from there begin to prefer Palestine as a destination rather than the U.S.
May 31Tulsa Race Massacre (Greenwood Massacre): Mobs of white residents attack black residents and businesses in Greenwood District, Tulsa, Oklahoma. The official death toll is 36, but later investigations suggest an actual figure between 100 and 300. 1,250 homes are destroyed and roughly 6,000 African Americans imprisoned in one of the worst incidents of mass racial violence in the United States.
Aug 25The Battle of Blair Mountain, the largest labor uprising in United States history and the country's largest peacetime armed uprising, begins in Logan County, West Virginia as part of the Coal Wars, continuing until September 2.
Sep 13White Castle hamburger restaurant opens in Wichita, Kansas, foundation of the world's first fast food chain.
Oct 21George Melford's wildly successful silent film The Sheik, which will propel its leading actor Rudolph Valentino to international stardom, premieres in Los Angeles.

Feb 21Conference of London of 1921–1922 convenes in an attempt to resolve problems arising from the dissolution of the Ottoman Empire.
Feb 27A Socialist congress at Vienna ends with the International Working Union of Socialist Parties founded.
Mar 9Cilicia Peace Treaty is signed between the French Third Republic and the Turkish National Movement in an attempt to end the Franco-Turkish War.
May 3The province of Northern Ireland is created within the United Kingdom.
May 5Chanel No. 5 perfume launched by Coco Chanel.
May 16The Communist Party of Czechoslovakia is founded.
Jul 29Adolf Hitler becomes Führer of the Nazi Party in Germany.
Sep 21The Oppau explosion occurs at BASF's nitrate factory in Oppau, Germany; over 500 are killed.
Oct 10Teaching at the University of Szeged begins, in the Kingdom of Hungary.
Oct 11The Irish Treaty Conference opens in London.
Oct 20Treaty of Ankara signed between the French Third Republic and the Government of the Grand National Assembly of Turkey, ending the Franco-Turkish War.
Nov 4After a speech by Adolf Hitler in the Hofbräuhaus in Munich (Germany), members of the Sturmabteilung ("brownshirts") physically assault his opposition.
Nov 9The National Fascist Party (Partito Nazionale Fascista or PNF) is founded in Italy.
Dec 6The Anglo-Irish Treaty establishing the Irish Free State, an independent nation incorporating 26 of Ireland's 32 counties, is signed in London.
Luxury goods brand Gucci is founded in Florence, Italy.

Feb 12Red Army invasion of Georgia: The Democratic Republic of Georgia is invaded by forces of Bolshevist Russia.
Feb 25Red Army invasion of Georgia: The Red Army enters the Georgian capital Tbilisi and occupies the country, installing a new government and proclaiming the Georgian Soviet Republic.
Feb 28The Kronstadt rebellion is initiated by sailors of the Soviet Navy's Baltic Fleet.
Mar 13Occupation of Mongolia: The Russian White Army captures Mongolia from China; Roman von Ungern-Sternberg declares himself ruler.
Mar 17The Red Army crushes the Kronstadt rebellion, and a number of sailors flee to Finland.
Mar 21The New Economic Policy starts in Soviet Russia.
Jun 22The Third Congress of the Communist International takes place.
Spring – Russian famine of 1921–22 begins; roughly 5,000,000 die.

Jul 1The Chinese Communist Party (CCP) is founded.
Jul 231st National Congress of the Chinese Communist Party opens in Shanghai.
Dec 23Visva-Bharati College is founded by Rabindranath Tagore in Santiniketan, Bengal Presidency, British India.

Feb 211921 Persian coup d'état: Rezā Khan and Zia'eddin Tabatabaee stage a coup d'état in Qajar dynasty Iran.
Mar 16Treaty of Moscow establishes friendly relations between the Government of the Grand National Assembly of Turkey and the Russian Socialist Federative Soviet Republic.
May 1Jaffa riots: Riots at Jaffa, Mandatory Palestine result in 47 Jewish and 48 Arab deaths.
Oct 13The Treaty of Kars is signed between the Government of the Grand National Assembly of Turkey and the Armenian, Azerbaijani and Georgian Socialist Soviet Republics in Transcaucasia, establishing common boundaries.

Jul 21Rif War: Battle of Annual – Spanish troops are dealt a crushing defeat at the hands of Abd el-Krim in Morocco.