How did the vietnamization plan contribute to the end of the vietnam war?
-vietnam remained divided geographically and politically.
-north and south vietnam unified, and us troops remained there for support.
-the united states fought until north vietnam was defeated in 1975.
-the united states withdrew its forces in 1973.

Correct  The United States withdrew its forces in 1973.

President Nixon’s Vietnamization policy emphasized that the United States must empower South Vietnamese forces to assume more combat duties.  

By the time the US was shifting emphasis to this sort of policy, it was too late to stave off the victory of the North Vietnamese and Viet Cong forces.  The US eventually withdrew its forces from Vietnam in 1973, and by 1975, Saigon (in South Vietnam) fell to the North Vietnamese communist forces.