What was the policy of replacing american military forces with that of south vietnamese called?

Wietnam war  or Second Indochina War, the Eastern Bloc countries with North Vietnam, China and the Soviet Union with US supporters of the war between the anti-communist South Vietnam and the US in particular. Was the second confrontation of the Cold War after the Korean War. US troops involved in the war from 1963 until 1973 and up to 60,000 soldiers died.

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