At 3:00 a.m., January 31, 1968, 70,000 North Vietnamese Army and Viet Cong guerrillas launched surprise attacks throughout Vietnam. On this holiday morning known as Tet, more than 100 cities and outposts were attacked. In Saigon, a suicide squad penetrated and briefly held U.S. embassy grounds. Fighting was fierce. Throughout Vietnam, servicemen fought to survive.