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Reactions to and end of US involvement in Vietnam - EdexcelReasons for the failure of the USA in Vietnam

Opposition to the Vietnam War within the USA grew as US forces failed to gain the expected victory. Finally, the USA introduced the policy of Vietnamisation, which ultimately led to the reunification of Vietnam under a communist regime.

Part of HistoryThe USA, 1954-75

Reasons for the failure of the USA in Vietnam

The strength of North Vietnam

One of the reasons the US entered peace negotiations was that North Vietnam was in a strong position. It had several advantages:

  • It could provide large numbers of troopsHo Chi Minh thought that North Vietnam could provide over 250,000 replacement troops each year.
  • It could wait out the war - troops could survive for long periods by living off farm produce in the South and supplies from the North.
  • It could resist limited US air attacks - the effectiveness of the USA鈥檚 bombing of the North was limited because of the North鈥檚 tunnel network and its decision to evacuate civilians from cities.
  • It could infiltratethe South - the Viet Cong had agents in important positions in the South, such as among those running the Strategic Hamlet Program.

North Vietnam's allies - China and the Soviet Union

Throughout the war, North Vietnam鈥檚 allies supplied them with about $2 billion worth of materials.

Type of supportExamples
WeaponsTanks, rifles and surface-to-air missile launchers
DefencesA comprehensive air defence system and pilot training
General suppliesFood and labour
Type of supportWeapons
ExamplesTanks, rifles and surface-to-air missile launchers
Type of supportDefences
ExamplesA comprehensive air defence system and pilot training
Type of supportGeneral supplies
ExamplesFood and labour

Chinese and support for North Vietnam also deterred the USA from increasing its involvement in the war. The USA decided that there could be only limited expansion of the war in Vietnam. It feared that anything more aggressive might lead the Chinese to send in large numbers of troops or might cause a serious conflict with the Soviet Union. This would make it even more difficult for the USA to win the war.

Controlling the South

A photograph of people carrying supplies up log steps on the Ho Chi Minh Trail
Figure caption,
A photograph of supplies being transported along the Ho Chi Minh Trail.

The North was able to take control of large areas of the South, because they made use of the . This was a network of roads, and trails that were used to transport food, soldiers, weapons and ammunition into the South. For example, at the height of the war, it is estimated that around 630,000 soldiers in total had travelled down the trail from the North.

This meant that the South was full of well-supplied troops from the North who fought for their belief in . They made the situation more difficult for the USA as they used guerrilla tactics. Although the Viet Cong suffered heavy casualties, these tactics helped because:

  • the Viet Cong could attack when they had the advantage, then retreat quickly into the jungle
  • the Viet Cong鈥檚 use of , and the difficulty of finding the enemy, demoralised US troops