Vietnam ground combat operations in 1965, and at their peak they numbered more than 500,000. The US also engaged in a sustained aerial bombing campaign. Meanwhile, China and the Soviet Union provided North Vietnam with significant material aid and 15,000 combat advisers. Communist forces supplying the Việt Cộng carried supplies along the Hồ Chí Minh trail, which passed through the Kingdom of Laos. The communists attacked South Vietnamese targets during the 1968 Tết Offensive. Although the campaign failed militarily, it shocked the American establishment, and turned US public opinion against the war. During the offensive, communist troops massacred over 3,000 civilians
1965 in the Vietnam War The siege led up to the Battle of Ia Drang. A CIA intelligence estimate said that "Hanoi continues to asset its determination to press on with the war in South Vietnam despite the continuing attrition of the air war and the increase of US troops in the South." To protest the Vietnam War, a Quaker named Norman Morrison doused himself in kerosene and set himself on fire in front of The Pentagon. Morrison died. In a memorandum to President Johnson, Secretary McNamara estimated total communist forces in South Vietnam as having increased to 230,000, including 71,000 Viet Cong main force,