1867
O Canada
Canada became a self-governing dominion of Great Britain under the British North America Act.
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1863
The Battle of Gettysburg, which marked the turning point in the Civil War, began.
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1898
Theodore Roosevelt and his Rough Riders fought the battle of San Juan Hill in the Spanish-American War.
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1943
Income tax withholding began in the United States.
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1962
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1963
The U.S. Post Office inaugurated its five-digit ZIP (Zone Improvement Plan) codes.
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1968
The United States, Britain, the Soviet Union, and 58 other nations signed the Nuclear Nonproliferation Treaty.
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1994
Yasir Arafat returned to Palestinian land after 27 years in exile.
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1997
After 156 years of British colonial rule, Hong Kong was returned to China.
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2000
Vermont's civil unions law went into effect.
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2013
Croatia became the 28th member of the European Union.
