The last U.S. combat troops had left in August 1972. The remaining U.S. military personnel (except for the staff of the Defense Attache's Office and the US Embassy's Marine guards) completed their withdrawal in March 1973. Despite the agreement, there was no end in fighting. South Vietnamese attempts to regain communist-controlled territory inspired their opponents to change strategy. Communist leaders met in Hanoi in March for a series of meetings to plan for a massive offensive against the South. In June 1973, the U.S. Congress passed the Case–Church Amendment, which prohibited any further U.S. military involvement, and the PAVN supply routes could operate normally without any fear of U.S. bombing.
The last U.S. combat troops had left in August 1972. The remaining U.S. military personnel (except for the staff of the Defense Attache's Office and the US Embassy's Marine guards) completed their withdrawal in March 1973. D.espite the agreement, there was no end in fighting. South Vietnamese attempts to regain communist-controlled territory inspired their opponents to change strategy. Communist leaders met in Hanoi in March for a series of meetings to plan for a massive offensive against the South. In June 1973, the U.S Congress passed the Case–Church Amendment, which prohibited any further U.S. military involvement, and the PAVN supply routes could operate normally without any fear of U.S. bombing.