WHAT ALL HAPPENED MARCH TO JUNE 1920
Find out what all happened March to June 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)

Azerbaijan is added to the Soviet Union. (28. April 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)

Duluth lynchings in Minnesota. (15. June 1920)

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

The Art Gallery of Ontario, in Toronto, opens the first exhibition by the Group of Seven. (7. May 1920)

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

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)

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

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

The Arab Kingdom of Syria, the first modern Arab state to come into existence, is established. (8. March 1920)

The Grand National Assembly of Turkey (TBMM) is founded in Ankara. (23. April 1920)

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

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

Hungary loses 71% of its territory and 63% of its population when the Treaty of Trianon is signed in Paris. (4. June 1920)

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

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

Two security guards are murdered during a robbery in South Braintree, Massachusetts. Anarchists Sacco and Vanzetti would be convicted of and executed for the crime, amid much controversy. (15. April 1920)