On this day in 1919, the US Congress approved the 19th Amendment to the United States Constitution, guaranteeing suffrage to women.
On this day in 1940, during World War II, the Dunkirk evacuation ended, with British forces completing evacuation of 338,000 troops from Dunkirk in France.
On this day in 1957, Dr. Martin Luther King, Jr. delivered his famous Power of Nonviolence speech at the University of California, Berkeley.
And on this day in 1989, the Tiananmen Square protests were violently suppressed in Beijing by the People's Liberation Army.