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[https://www.nps.gov/revwar/about_the_revolution/overview.html]
American Revolution, as known as American Revolutionary War, refers to which people from thirteen colonies sought for independence from Great Britain during 1775-1783. -
With the Good Neighbor Policy, American helped Panama to get independent of Columbia in 1903
http://www.american-historama.org/1929-1945-depression-ww2-era/good-neighbor-policy.htm -
Because of the attack to Pearl Harbor, former president Franklin Roosevelt joined Allies and declared war to against Axis Powers.
[https://www.britannica.com/event/World-War-II] -
After World War II, a national power competition between The United States and Soviet Union processed.
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In 1950, when North Korea supported by Soviet Union and China invaded South Korea, the United States joined the war to protect South Korean from falling into the communist alignment.
[https://www.history.com/topics/korean-war] -
Vietnam War, as known as the Second Indochina War, was the war between the government of South Vietnam and the government of North Vietnam. The United States joined the war to support South Vietnam to against communist power.
[http://www.historynet.com/vietnam-war] -
The Gulf War is the United States to against Iraq for the invasion of Kuwait.
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The United States intervened the civil war happened in Libya and killed Gaddafi in 2011.
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The United States sold missiles to Ukraine to defend the revolution held by pro-Russian and anti-government groups. [https://eadaily.com/en/news/2018/04/09/lukashevich-us-hampering-political-settlement-in-donbass]
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In 2018, the United States conducted missile strike to against Syria
[https://www.nytimes.com/2018/04/13/world/middleeast/trump-strikes-syria-attack.html]
