What was the name of president Nixon's policy aimed at replacing American military forces with those of South Vietnam?

The policy aimed at replacing American military forces with those of South Vietnam is known as Vietnamization. This strategy was implemented during the Vietnam War, particularly in the late 1960s and early 1970s. The objective of Vietnamization was to gradually withdraw U.S. troops while simultaneously increasing the combat role and capabilities of the South Vietnamese military. This approach was intended to ensure that South Vietnam could maintain its independence and combat communist forces on its own without the direct involvement of U.S. forces.

This policy was pivotal in shaping U.S. military involvement in Vietnam, as it marked a shift from direct military engagement to training and equipping South Vietnamese troops to take over the responsibilities of fighting in the conflict. By doing so, it aimed to achieve "peace with honor," allowing for a responsible exit of U.S. forces while striving to ensure that South Vietnam could defend itself.

The other options represent different concepts: Detente refers to the easing of strained relations, particularly between the United States and the Soviet Union; Containment was a strategy aimed at preventing the expansion of communism; and Rollback is associated with efforts to actively eliminate communist influence rather than merely containing it.