Why did U.S. combat forces leave Vietnam in 1973?

U.S. combat forces withdrew from Vietnam in 1973 primarily as a result of the Agreement on Ending the War and Restoring Peace in Viet-Nam, signed in Paris on January 27, 1973.1

This agreement followed years of deadlocked negotiations and a strategic shift by the Nixon administration known as Vietnamization, which aimed to transfer combat responsibilities to South Vietnamese forces. Several factors drove the U.S. toward this withdrawal:12

• Diplomatic Progress: After the failure of the 1972 communist Easter Offensive, Hanoi became more willing to compromise, leading to a breakthrough in negotiations between Henry Kissinger and Le Duc Tho.1
• Domestic Pressure: Widespread disillusionment with the war in the United States, fueled by anti-war protests and concerns over the morality and fairness of the draft, made continued military involvement politically unsustainable.13
• Military Realities: The administration recognized that a decisive military victory was unattainable and that a phased withdrawal was necessary to end the conflict while attempting to maintain U.S. credibility.3

The 1973 treaty mandated the complete withdrawal of U.S. troops and the dismantling of bases within 60 days.41