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By 1969, it was clear that the USA could not win the Vietnam War militarily. The new President, Richard Nixon, pursued a strategy of Vietnamisation — gradually withdrawing American troops while building up South Vietnamese forces. This lesson traces the final years of the war, from Nixon's strategy to the fall of Saigon in 1975.
Vietnamisation was the policy of transferring responsibility for the war from US forces to the Army of the Republic of Vietnam (ARVN) — the South Vietnamese military.
| Feature | Detail |
|---|---|
| Announced | June 1969 |
| Aim | Withdraw US troops while strengthening South Vietnam's ability to fight alone |
| Troop withdrawals | US troop numbers reduced from 536,000 (1968) to 156,000 (1971) to 24,000 (1972) |
| Military aid | Massive amounts of weapons, equipment, and training provided to ARVN |
| Air power | The USA continued to provide air support even as ground troops withdrew |
| Strengths | Weaknesses |
|---|---|
| Reduced US casualties and domestic opposition | ARVN was poorly led and often lacked motivation |
| Provided massive military equipment to South Vietnam | South Vietnamese government was corrupt and unpopular |
| Maintained US air support | Without US ground troops, the military balance shifted |
| The policy was essentially asking South Vietnam to do what the USA, with 536,000 troops, had failed to do |
Exam Tip: Vietnamisation is often criticised as "changing the colour of the corpses" — replacing American casualties with South Vietnamese ones while achieving no change in the military situation.
Despite withdrawing troops, Nixon expanded the war into neighbouring countries.
| Event | Detail |
|---|---|
| Secret bombing | Nixon authorised secret bombing of Cambodia from 1969 (Operation Menu) |
| Ground invasion | In April 1970, US and ARVN forces invaded Cambodia to destroy Viet Cong bases |
| Domestic reaction | Triggered massive protests in the USA, including the Kent State shootings |
| Impact | Destabilised Cambodia, contributing to the rise of the Khmer Rouge |
Peace negotiations had begun in Paris in May 1968 but made little progress for years. Key obstacles included:
| Obstacle | Detail |
|---|---|
| Status of South Vietnam | North Vietnam demanded the removal of the Thieu government |
| Troop withdrawal | The USA wanted North Vietnamese troops to withdraw from South Vietnam |
| Prisoners of war | Both sides held POWs; their return was a major issue |
| Ceasefire terms | Disagreement over the terms of a ceasefire |
The real negotiations took place in secret back-channel talks between US National Security Advisor Henry Kissinger and North Vietnamese negotiator Le Duc Tho.
When peace talks stalled in December 1972, Nixon ordered Operation Linebacker II — an intensive bombing campaign against Hanoi and Haiphong.
| Feature | Detail |
|---|---|
| Duration | 18–29 December 1972 |
| Scale | Over 20,000 tonnes of bombs dropped in 12 days |
| Targets | Hanoi, Haiphong, military and industrial targets |
| Casualties | Approximately 1,600 Vietnamese civilians killed |
| Purpose | Pressure North Vietnam to return to negotiations; reassure South Vietnam of US commitment |
| Reaction | International condemnation; described as "carpet bombing" by critics |
On 27 January 1973, the Paris Peace Accords were signed.
| Term | Detail |
|---|---|
| Ceasefire | Immediate ceasefire throughout Vietnam |
| US withdrawal | All US troops to leave within 60 days |
| POWs | All prisoners of war to be returned |
| South Vietnam | The Thieu government would remain in power |
| North Vietnamese troops | Were not required to withdraw from South Vietnam |
| Elections | Future elections promised but never defined |
Exam Tip: The key weakness of the Paris Accords was that North Vietnamese troops remained in South Vietnam. This made it almost certain that fighting would resume once US forces left. Kissinger and Le Duc Tho were awarded the Nobel Peace Prize, but Le Duc Tho declined it, saying peace had not been achieved.
After US withdrawal, the North Vietnamese prepared for a final offensive. Without American air support and military aid (Congress cut funding in 1974), the South Vietnamese government collapsed.
| Event | Date | Detail |
|---|---|---|
| North Vietnamese offensive begins | March 1975 | NVA launches major attack across South Vietnam |
| ARVN collapses | March–April 1975 | South Vietnamese forces disintegrate; cities fall rapidly |
| Fall of Saigon | 30 April 1975 | North Vietnamese tanks crash through the gates of the Presidential Palace |
| Helicopter evacuation | 29–30 April 1975 | Desperate evacuation of remaining Americans and some Vietnamese from the US Embassy rooftop |
| Vietnam reunified | July 1976 | Vietnam officially reunified as the Socialist Republic of Vietnam |
The image of the last helicopter leaving the US Embassy rooftop became one of the most iconic photographs of the twentieth century — a symbol of American defeat.
| Person | Role |
|---|---|
| Richard Nixon | US President (1969–1974); pursued Vietnamisation; resigned over Watergate |
| Henry Kissinger | National Security Advisor; negotiated the Paris Peace Accords |
| Le Duc Tho | North Vietnamese negotiator; declined the Nobel Peace Prize |
| Nguyen Van Thieu | South Vietnamese President; felt betrayed by the USA |
| Gerald Ford | US President after Nixon resigned; oversaw the final evacuation |
Question stem: "Explain the importance of the Paris Peace Accords (27 January 1973) for the end of the Vietnam War."
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