Martin Luther confronts the emperor Charles V, refusing to retract the views which led to his excommunication.
American revolutionaries Paul Revere and William Dawes ride though the towns of Massachusetts warning that "the British are coming."
A regiment of Indians and blacks is defeated at the Battle of Suwannee, in Florida, ending the First Seminole War.
U.S. forces defeat Mexicans at Cerro Gordo in one of the bloodiest battle of the Mexican-American War.
The First Sino-Japanese War ends.
A massive earthquake hits San Francisco, measuring 8.25 on the Richter scale.
Yankee Stadium opens with Babe Ruth hitting a three-run homer as the Yankees beat the Red Sox 4-1.
Leon Trotsky calls for the overthrow of Soviet leader Josef Stalin.
James H. Doolittle bombs Tokyo and other Japanese cities.
Colonel Gamal Abdel Nasser seizes power in Egypt.