Questions: According to the terms of the peace accords signed in Paris in 1973, the United States would withdraw its troops only after the North Vietnamese left South Vietnam had to agree to allow the North Vietnamese to control all of Vietnam could maintain a military presence in Vietnam but would halt bombing the north would withdraw all of its troops from South Vietnam

The answer is: would withdraw all of its troops from South Vietnam.

Explanation for each option:

1. The United States would withdraw its troops only after the North Vietnamese left South Vietnam:

   • This is incorrect. The Paris Peace Accords did not stipulate that North Vietnamese forces had to leave South Vietnam as a condition for the withdrawal of U.S. troops.

2. The United States had to agree to allow the North Vietnamese to control all of Vietnam:

   • This is incorrect. The accords did not grant control of all of Vietnam to the North Vietnamese. Instead, they aimed to establish a ceasefire and a framework for peaceful reunification.

3. The United States could maintain a military presence in Vietnam but would halt bombing the north:

   • This is incorrect. The accords required the complete withdrawal of U.S. military forces from South Vietnam, not just a cessation of bombing.

4. The United States would withdraw all of its troops from South Vietnam:

   • This is correct. The Paris Peace Accords, signed in January 1973, stipulated that the United States would withdraw all its military forces from South Vietnam within 60 days. This was a key component of the agreement aimed at ending U.S. involvement in the Vietnam War.