The United States entered the Korean War when North Korea invaded South Korea with support from China and the Soviet Union.
The United States got involved in the Korean War when North Korea invaded South Korea.
In 1950, with support from China and the Soviet Union, North Korea, led by Kim Il Sung, invaded South Korea in an attempt to unify the peninsula under communist rule. The United States intervened to support its ally, South Korea, marking the beginning of U.S. involvement in the Korean War.
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