The Tet Offensive, which began on January 30-31, 1968 with well-coordinate Viet-Cong attack on major cities and military installations throughout South Vietnam, was in fact the United States’ Dien Bien Phu. Many provincial capitals, including the imperial city of Hue fell to the Viet Cong. The U.S. base at Khe Sanh was nearly overrun by the Communist with heavy American casualties. The Tet Offensive broke the will of the Johnson administration to continue the war. Robert McNamara, in his statement to Congress, conceded that the bombing in February 1968 of North Vietnam could not that halt the flow of troops and war material to the South. The conclusion was obvious Lyndon Johnson and had embarked upon a futile course and his judgment had been faulty. On March 31, 1968, Johnson, speaking on television, stated that he would not add to the number of U.S. troops already in Vietnam and announced that he was halting all air and naval bombardment of North Vietnam and declared that he would neither seek nor accept the Democratic presidential nomination that year.