WHAT ALL HAPPENED MAY TO NOVEMBER 1920
Find out what all happened May to November 1920

Polish–Soviet War: Battle of Warsaw, which began on August 13, ends with the Red Army's defeat. (25. August 1920)

Italy and the Kingdom of Serbs, Croats and Slovenes sign the Treaty of Rapallo. (12. November 1920)

A new border treaty between Germany and Denmark gives northern Schleswig to Denmark. (15. June 1920)

Adam Martin Wyant became the first former professional American football player to be elected to the United States Congress. (2. November 1920)

Polish-Soviet War: The Polish army under General Edward Rydz-Śmigły celebrates its capture of Kiev with a victory parade on Khreschatyk. (9. May 1920)

After 74 days on Hunger Strike in Brixton Prison, England, the Sinn Féin Lord Mayor of Cork, Terence MacSwiney died. (25. October 1920)

The Polish Parliament establishes Silesian Voivodeship before the Polish-German plebiscite. (15. July 1920)

Authorities arrest Nicola Sacco and Bartolomeo Vanzetti for alleged robbery and murder. (5. May 1920)

Kiev Offensive: Polish troops led by Józef Piłsudski and Edward Rydz-Śmigły and assisted by a symbolic Ukrainian force capture Kiev only to be driven out by the Red Army counter-offensive a month later. (7. May 1920)

In Rome, Pope Benedict XV canonizes Joan of Arc. (16. May 1920)

Polish-Bolshevik War: a decisive Polish victory in the Battle of Komarów. (31. August 1920)

The first radio news program is broadcast by 8MK in Detroit, Michigan. (31. August 1920)

Treaty of Moscow: Soviet Russia recognizes the independence of the Democratic Republic of Georgia only to invade the country six months later. (7. May 1920)

American Fishing Schooner Esperanto defeats the Canadian Fishing Schooner Delawana in the First International Fishing Schooner Championship Races in Halifax. (1. November 1920)

Patriarch Tikhon issues a decree that leads to the formation of the Russian Orthodox Church Outside Russia. (7. November 1920)

The Communist Party of Australia is founded in Sydney. (30. October 1920)

Irish War of Independence: In Dublin, 31 people are killed in what became known as "Bloody Sunday". This included fourteen British informants, fourteen Irish civilians and three Irish Republican Army prisoners. (21. November 1920)

The Latvian–Soviet Peace Treaty, which relinquished Russia's authority and pretenses to Latvia, is signed, ending the Latvian War of Independence. (11. August 1920)

Part of Petsamo Province is ceded by the Soviet Union to Finland. (14. October 1920)

In the United States, KDKA of Pittsburgh, Pennsylvania starts broadcasting as the first commercial radio station. The first broadcast is the result of the United States presidential election, 1920. (2. November 1920)