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Foreign Policy and International Relations

This timeline focuses on the major events and policies in U.S. foreign policy and international relations.
Monroe Doctrine
1823
President James Monroe asserts U.S. opposition to further European colonization in the Americas.
World War I
1917 - 1918
The U.S. enters World War I, playing a crucial role in the Allied victory.
Cold War
1945 - 1991
The U.S. engages in a decades-long geopolitical rivalry with the Soviet Union, marked by proxy wars, espionage, and nuclear deterrence.
War on Terror
2001 - present
The U.S. responds to the 9/11 attacks by launching military operations in Afghanistan and Iraq, and engaging in global counterterrorism efforts.