Involvement of United States in Korean war is described below.
Explanation:
The US become involved because they want.ed to stop the spread of communism. This was called containment. The war was a success in that they held off the North Korean invasion, and it showed that the US would help any country with the risk of becoming communist.
By vigorously pursuing this policy, the United States might be able to contain communism within its current borders. The policy became known as the Truman Doctrine, as the President outlined these intentions with his request for monetary aid for Greece and Turkey.
Communist China joined North Korea in the war in November 1950, unleashing a massive Chinese ground attack against American forces. The Soviet Union also covertly supported North Korea.
After three years of fighting, the war ended in a stalemate with the border between North and South Korea near where it had been at the war’s beginning.
This was the first hot war of the Cold War, and in it the United States demonstrated its continued commitment to containment (the idea that the US would ultimately defeat communism by containing its spread).
The strategy of "containment" is best known as a Cold War foreign policy of the United States and its allies to prevent the spread of communism after the end of World War II.