What was the Tet Offensive?
Answer
A major communist attack in 1968
Explanation
The Tet Offensive was a massive coordinated communist attack launched by North Vietnam and the Viet Cong against South Vietnamese cities and American military bases beginning January 30 and 31, 1968. The offensive took its name from Tet Nguyen Dan, the Vietnamese lunar new year, normally a period of unofficial truce. North Vietnamese General Vo Nguyen Giap planned the campaign as a strategic blow to break the will of the South Vietnamese government and the American public.
About 84,000 communist troops attacked simultaneously across more than 100 South Vietnamese cities, towns, and military installations. They struck 36 of South Vietnam's 44 provincial capitals and 5 of its 6 largest cities. Particularly shocking was an attack on the United States Embassy in Saigon, where 19 Viet Cong sappers blew a hole in the compound wall and held a portion of the grounds for several hours before being killed by American military police.
American and South Vietnamese forces blunted most of the assaults within days, but heavy fighting continued in several places. The Battle of Hue lasted from January 31 to March 3, 1968 and was the longest urban battle of the war. Communist forces seized most of the ancient imperial capital, executed about 2,800 to 6,000 civilians and government officials in mass killings, and were finally driven out by United States Marines and South Vietnamese troops in house-to-house fighting that destroyed much of the city. The Marine combat base at Khe Sanh was besieged from January 21 to July 9, 1968, drawing American troops and air power away from other areas.
Militarily, Tet was a defeat for the communists. Estimates put their losses at 35,000 to 45,000 dead, with the Viet Cong nearly destroyed as a fighting force. American and South Vietnamese forces lost roughly 4,000 dead.
The political and psychological impact in the United States was the opposite. American officials had been telling the public that the war was being won and that there was a light at the end of the tunnel, and the scale of the offensive shattered that confidence. CBS News anchor Walter Cronkite declared on February 27, 1968 that the war was a stalemate. President Lyndon B. Johnson announced on March 31, 1968 that he would not seek reelection. The Tet Offensive marked the turning point that began the long American withdrawal from Vietnam.
Why this matters for your test
USCIS asks about the Tet Offensive because it is the most studied turning point of the Vietnam War and a textbook example of how military events can shape public opinion. Understanding Tet helps applicants see the link between battlefield events and democratic accountability.
Source: USCIS 128 Civics Questions (2025)
