Comfort woman — military sexual slavery system designed and implemented by Japan Empire from early 1930s until the end of World War II, or the victims who were forced into sexual slavery by the Japanese military

Anti-Hindu communal violence involving loot and arson

Disturbances, strikes and riots in British Caribbean colonies, 1934–1939.

Communal riots in Vellore

Period of racial violence in Watsonville, California

Vinnytsia massacre — mass execution in Ukraine

Salt March — Indian independence movement event led by Mahatma Gandhi

3rd Chess Olympiad — FIDE chess tournament for national teams

1930 British Empire Games — multi-sport event in Hamilton, Canada

Tintin in the Land of the Soviets — First story of The Adventures of Tintin

Medical negligence case in Weimar Germany