How did the ter offensive affect perceptions of the vietnam war within the united states?

Americans grew critical of the war because the Viet Cong were viewed as remaining strong. The North Vietnamese Army together with the Vietcong launched a massive offensive on South Vietnam during the holiday of Tet.  Fighting erupted on various fronts including the capital of Saigon.  Even the U.S. Embassy breached by the enemy.  Though the Communists were driven out and suffered massive casualties, American public opinion turned against the war and it resulted into the withdrawal of U.S. troops from South Vietnam.  This led the North to conquer the South ending in a unified Vietnam under Communist rule for decades.