During the Vietnamese celebration of their New Year (Tet) in 1968, the Vietcong and N. Vietnamese Army forces launched their biggest offensive of the war to that time. It was supposed to completely defeat the US and S. Vietnamese forces. Because it came as a surprise when most of the people in the US had thought we were "winning" the war, it was a major psychological blow to the morale of the US public. After weeks of bloody fighting the N. Vietnamese retreated back into Cambodia and Laos and the local Vietcong guerrillas of S. Vietcong were decimated. However, the psychological damage had been done on the home-front. The major news commentator, Walter Cronkite, solemnly predicted that the Vietnam War was "un-winnable." From then on the anti-war movement grew in intensity.