10. Which stutement about U.8 involvement in Vietnam is true? Warn's expansion of the war into Cambodia drew strong support at home purbicularly from those on college campuses. United States imvolvement in the war did not occur until after Dients assassination in 1963. The Tet Offensive proved the success of the containment doctrine and effectively ended the war Congress authorized the escalation of United States military activity in Vietnam after communist forces allegedly attacked United States naval vessels.

## Step 1<br />The problem presents four statements about the U.S. involvement in Vietnam and asks us to identify the true one. <br /><br />## Step 2<br />The first statement suggests that the expansion of the war into Cambodia drew strong support at home, particularly from those on college campuses. However, this is not accurate. The expansion of the war into Cambodia was met with significant opposition, particularly from college students who were against the war.<br /><br />## Step 3<br />The second statement claims that the U.S. involvement in the war did not occur until after Kennedy's assassination in 1963. This is also not true. The U.S. involvement in Vietnam began before Kennedy's assassination, with the first U.S. military advisors being sent to Vietnam in 1955.<br /><br />## Step 4<br />The third statement says that the Tet Offensive proved the success of the containment doctrine and effectively ended the war. This is not correct. The Tet Offensive was a turning point in the war, but it did not prove the success of the containment doctrine nor did it effectively end the war.<br /><br />## Step 5<br />The fourth statement is that Congress authorized the escalation of United States military activity in Vietnam after communist forces allegedly attacked United States naval vessels. This is true. The Gulf of Tonkin Incident, where North Vietnamese forces allegedly attacked U.S. naval vessels, led to the Gulf of Tonkin Resolution, which authorized the escalation of U.S. military involvement in Vietnam.