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French Invasion of Mexico.
Isolationism, Monroe Doctrine. -
Spanish-American War begins.
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Trade Wars in China.
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Panama Canal authorized.
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U.S. enters World War I.
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U.S. enters World War II.
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United Nations established.
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Berlin Blockade.
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Korean War begins.
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Cuban Missile Crisis.
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U.S. commits to Vietnam War.
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SALT I treaty.
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Soviet invasion of Afghanistan
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Operation Iraqi Freedom