Multiple choice This bloody offensive marked a turning point in US public opinion on the Vietnam War Inch'on Offensive Vet Offensive Tet Offensive Pol Pot Offensive Reveal answer Fill a bubble to check yourself C Correct answer Explanation The Tet Offensive in 1968 was a massive series of surprise attacks by North Vietnamese forces. It shocked the American public and shifted opinion against the war, as it contradicted official claims that the US was winning.