Before World War II, except participating in the World War I, the United States launched few external military actions. After World War II, the United States and the Soviet Union became the superpowers. The UnitedState’ strategic interests spread throughout all over the world. The United States began to launch frequently external military actions. According to statistics, during the Cold War, the United States has launched 125 large-scale military actions.[1]
In order to introduce the brief history of US military actions after World War II, I divide this piece of history into three stages:
1.        the Cold War (1945-1991)
2.        the post-Cold War (1991-2001)
3.        the War on Terrorism (2001-Present)
I will introduce the backgrounds, and give a list of US military actions of each stage. Then I will analyze the characteristics, and the main influences of the US military actions of each stage.
Finally, I will try to come to some conclusions, and forecast the future trends.
 

[1] See: http://www.people.com.cn/GB/guoji/22/86/20030119/910634.html (in Chinese)

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