The Battle of Gettysburg, which marked the turning point in the Civil War, began.
Canada became a self-governing dominion of Great Britain under the British North America Act.
Theodore Roosevelt and his Rough Riders fought the battle of San Juan Hill in the Spanish-American War.
Income tax withholding began in the United States.
Burundi and Rwanda achieved independence.
The U.S. Post Office inaugurated its five-digit ZIP (Zone Improvement Plan) codes.
The United States, Britain, the Soviet Union, and 58 other nations signed the Nuclear Nonproliferation Treaty.
Yasir Arafat returned to Palestinian land after 27 years in exile.
After 156 years of British colonial rule, Hong Kong was returned to China.
Vermont's civil unions law went into effect.
The Confederate flag was removed from the South Carolina statehouse.