WHAT ALL HAPPENED JANUARY TO OCTOBER 1920
Find out what all happened January to October 1920

The United States Senate rejects the Treaty of Versailles for the second time (the first time was on November 19, 1919). (19. March 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)

Azeri and Turkish army soldiers with participation of Kurdish gangs attacked the Armenian inhabitants of Shushi (Nagorno Karabakh). (22. March 1920)

The Netherlands refuses to surrender the exiled Kaiser Wilhelm II of Germany to the Allies. (23. January 1920)

During the U.S. Republican National Convention in Chicago, U.S. Republican Party leaders gathered in a room at the Blackstone Hotel to come to a consensus on their candidate for the U.S. presidential election, leading the Associated Press to first coin the political phrase "smoke-filled room". (11. June 1920)

In the East Prussian plebiscite the local populace decides to remain with Weimar Germany. (11. July 1920)

World War I: Ottoman sultan Mehmed VI's representatives sign the Treaty of Sèvres that divides up the Ottoman Empire between the Allies. (10. August 1920)

Ray Chapman of the Cleveland Indians is hit on the head by a fastball thrown by Carl Mays of the New York Yankees, and dies early the next day. Chapman was the second player to die from injuries sustained in a Major League Baseball game, the first being Doc Powers in 1909. (16. August 1920)

The national council in Turkey denounces the government of Sultan Mehmed VI and announces a temporary constitution. (23. April 1920)

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

The first game of the Negro National League baseball is played in Indianapolis. (2. May 1920)

Peru becomes a signatory to the Buenos Aires copyright treaty. (30. April 1920)

Sir Percy Cox lands in Basra to assume his responsibilities as high commissioner in Iraq. (1. October 1920)

Palm Sunday tornado outbreak of 1920 affects the Great Lakes region and Deep South states. (28. March 1920)

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

Two newly purchased Savoia flying boats crash in the Swiss Alps en route to Finland where they would serve with the Suomen Ilmavoimat, killing both crews. (7. September 1920)

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

France occupies Memel. (2. February 1920)

Jozef Haller de Hallenburg performs symbolic wedding of Poland to the sea, celebrating restitution of Polish access to open sea. (10. February 1920)

The United States Senate votes against joining the League of Nations. (19. January 1920)