WHAT ALL HAPPENED FEBRUARY TO MAY 1921
Find out what all happened February to May 1921

Tulsa race riot: civil unrest in Tulsa, Oklahoma. The official death toll is 39, but recent investigations suggest the actual toll may be much higher. (31. May 1921)

The Royal Australian Air Force is formed. (31. March 1921)

Kingdom of Romania establishes its legation in Helsinki. (15. February 1921)

The Young Communist League of Czechoslovakia is founded. (20. February 1921)

The Second Republic of Poland adopts the March Constitution. (17. March 1921)

After Russian forces under Baron Roman von Ungern-Sternberg drive the Chinese out, the Bogd Khan is reinstalled as the emperor of Mongolia. (22. February 1921)

Black Friday: mine owners announce more wage and price cuts, leading to the threat of a strike all across England. (15. April 1921)

The trial of Sacco and Vanzetti opens. (24. May 1921)

Irish War of Independence: One of the biggest engagements of the war takes place at Crossbarry, County Cork. About 100 Irish Republican Army (IRA) volunteers escape an attempt by over 1,300 British forces to encircle them. (19. March 1921)

Mongolia is proclaimed an independent monarchy, ruled by Russian military officer Roman von Ungern-Sternberg as a dictator. (13. March 1921)

The International Working Union of Socialist Parties is founded in Vienna. (27. February 1921)

The U.S. Congress passes the Emergency Quota Act establishing national quotas on immigration. (19. May 1921)

Constituent Assembly of the Democratic Republic of Georgia adopts the country's first constitution. (21. February 1921)

Rezā Shāh takes control of Tehran during a successful coup (21. February 1921)

Italian Fascists shoot from the Parenzana train at a group of children in Strunjan (Slovenia): two children are killed and five wounded. (19. March 1921)

The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established. (2. April 1921)

Tbilisi, capital of the Democratic Republic of Georgia, is occupied by Bolshevist Russia. (25. February 1921)

Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan. (11. April 1921)

The Australian cricket team captained by Warwick Armstrong becomes the first team to complete a whitewash of The Ashes, something that would not be repeated for 86 years. (1. March 1921)

İstiklal Marşı was adopted in TBMM(Turkish grand national assembly). (12. March 1921)