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The United States starts to emerge as a world economic power and sees its oppurtunity to expand into other countries.
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The United States starts to stand its ground against European powers and assert its power.
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Spain surrenders control of Cuba and ceding Puerto Rico, the West Indies, Guam, and the Philippines to the United States.
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The United States finishes the canal, allowing for better movement for commercial vessels.
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Congress successfully votes to declare war on Germany, making it one of the first times America becomes involved with foreign affairs after a long era of isolationism.
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End to World War I, United States focuses on rebulding the European economy.
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Due to the Treaty Of Versailles' and League of Nation's ineffectiveness at preventing another German rise to power, World War II begins with the invasion of Poland.
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The US officially enters the war after the Attack on Pearl Harbor.
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United States push to change the Empire of Japan into a democracy through large scale foreign occupation.
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The end of World War II marked the end of American isolationism but started a new Cold War era.
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Beginning of the containment policy to stop Soviet expansion.
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War between the North and South of Korea. The South was heavily supported by the United States and United Nations in order to combat increasing Communist control.
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The United States enters a proxy war in order to stop the spread of Communism in the country.
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Soviet controlled Cuba had began to hold nuclear missles, from the USSR, which was heavily contested by the United States. The closest part of the Cold War to there being a nuclear conflict.
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The Organization of Arab Petroleum Exporting Countries proclaimed an oil embargo that globally affected world oil prices and nearly tripled US oil costs.
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Operation to restore a constitutional government in Grenada. Although successful in removing the military coup, the United Nations saw it as a violation of international law.
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The United States' response to Iraq's invasion of Kuwait, another instance of America's involvement in foreign affairs.
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The Cold War ends with the USSR dissolving, ending the Cold War and leaving the United States as a dominant world power.
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After the 9/11 Plane Hijackings, the United States invades Afghanistan.
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Led to the collapse of the Iragi government for the reasons of spreading democracy and disarmament.
