Tet Offensive Begins in South Vietnam

Context

In the years before 1968, South Vietnam navigated political instability after the 1963 coup that ousted Ngo Dinh Diem. Rival generals vied for power until 1967 elections installed Nguyen Van Thieu as president and Nguyen Cao Ky as vice president, bringing a degree of stability after earlier turmoil. U.S. strategy under General William Westmoreland emphasized attrition warfare, seeking a crossover point where communist losses would outpace replacements, though intelligence debates persisted over enemy strength estimates.

What Happened

North Vietnamese leaders, including Le Duan and the Politburo, timed the offensive for the Tet holiday, traditionally observed with a truce and family travel that masked troop movements. Attacks began prematurely on January 30 in parts of I and II Corps, giving allies time to prepare. The main wave hit on January 31 as roughly 80,000 PAVN and Viet Cong soldiers struck more than 100 targets, including 36 provincial capitals, Saigon, and Hue.

Aftermath

Allied forces repelled most assaults within days, though fighting in Hue lasted nearly a month and around Khe Sanh continued longer. Communist units incurred heavy losses, with U.S. and South Vietnamese claims exceeding 45,000 killed in the first phase, and no widespread defections or uprisings occurred. The scale of the coordinated attacks contradicted official U.S. optimism about progress, prompting intense media coverage that highlighted the war's stalemate.

Legacy

The offensive proved a military setback for Hanoi yet produced a decisive political shift in the United States. Graphic reporting eroded public confidence, accelerating President Johnson's March 1968 decision to halt bombing above the 20th parallel, limit troop levels, and forgo reelection. Historians regard Tet as a classic case where battlefield events reshaped political will, paving the way for Vietnamization and eventual U.S. withdrawal.