WHAT ALL HAPPENED APRIL TO MAY 1920
Find out what all happened April to 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)

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

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

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

At the San Remo conference, the principal Allied Powers of World War I adopt a resolution to determine the allocation of Class "A" League of Nations mandates for administration of the former Ottoman-ruled lands of the Middle East. (25. April 1920)

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

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

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

Montreal, Quebec radio station XWA broadcasts the first regularly scheduled radio programming in North America. (20. May 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)

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

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