The United States began drastically reducing their troop support in South Vietnam during the final years of "Vietnamization". Many U.S. troops were removed from the region, and on 5 March 1971, the United States returned the 5th Special Forces Group, which was the first American unit deployed to South Vietnam, to its former base in Fort Bragg, North Carolina.
Under the Paris Peace Accords, between North Vietnamese Foreign Minister LÃª Ãá»©c Thá» and U.S. Secretary of State Henry Kissinger, and reluctantly signed by South Vietnamese President Thiá»‡u, U.S. military forces withdrew from South Vietnam and prisoners were exchanged. North Vietnam was allowed to continue supplying communist troops in the South, but only to the extent of replacing materials that were consumed. Later that year the Nobel Peace Prize was awarded to Kissinger and Thá», but the Vietnamese negotiator declined it saying that a true peace did not yet exist.
The communist leaders had expected that the ceasefire terms would favor their side. But Saigon, bolstered by a surge of U.S. aid received just before the ceasefire went into effect, began to roll back the Vietcong. The communists responded with a new strategy hammered out in a series of meetings in Hanoi in March 1973, according to the memoirs of Tráº§n VÄƒn TrÃ .
As the Vietcong's top commander, TrÃ participated in several of these meetings. With U.S. bombings suspended, work on the Ho Chi Minh Trail and other logistical structures could proceed unimpeded. Logistics would be upgraded until the North was in a position to launch a massive invasion of the South, projected for the 1975â€“76 dry season. TrÃ calculated that this date would be Hanoi's last opportunity to strike before Saigon's army could be fully trained.
Map of the United States, showing Nixon's victories in 49 states (red) over McGovern.
Calling for immediate withdrawal of U.S. forces from Vietnam, George McGovern's 1972 Presidential Campaign lost 49 of 50 states to Richard Nixon.
In the November 1972 Election, McGovern lost 49 of 50 states to Richard Nixon, who was re-elected U.S. president. Despite supporting Nixon over McGovern, many American voters split their tickets, returning a Democratic majority to both houses of Congress.
On 15 March 1973, U.S. President Richard Nixon implied that the United States would intervene militarily if the communist side violated the ceasefire. Public and congressional reaction to Nixon's trial balloon was unfavorable and in April Nixon appointed Graham Martin as U.S. ambassador to Vietnam. Martin was a second stringer compared to previous U.S. ambassadors and his appointment was an early signal that Washington had given up on Vietnam. During his confirmation hearings in June 1973, Secretary of Defense James R. Schlesinger stated that he would recommend resumption of U.S. bombing in North Vietnam if North Vietnam launched a major offensive against South Vietnam. On 4 June 1973, the U.S. Senate passed the Case-Church Amendment to prohibit such intervention.