Samuel Johnson published his Dictionary of the English Language.
In response to the attack on Fort Sumter three days earlier, President Abraham Lincoln declared a state of insurrection and called out Union troops.
A paymaster and guard were murdered in Braintree, Mass. Sacco and Vanzetti were accused of the crime.
Nazi concentration camp Bergen-Belsen was liberated by Canadian and British forces.
Jackie Robinson made his Brooklyn Dodger debut and scored the game-winning run. On April 15, 1997, his number, 42, was retired.
Ray Kroc acquired McDonald's and opened his first restaurant in Des Plaines, Ill., today the official McDonald’s Corporate Museum.
The 100th Boston Marathon was won by Moses Tanui of Kenya.