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
South Korea in the Vietnam War second half. Corruption did occur in which US-issued weapons were re-directed and sold to Korean ships for re-sale to the Korean government and supplementing the arsenal of Korean forces stationed in Korea, whom were still given M1 Garand rifles instead of the newer-issue M16 rifle given out to ARVN and ROK forces in South Vietnam The withdrawal process had negatively impacted Korean-US relations, despite economic benefits gained, with Nixon and Secretary of Defense Melvin Laird considering simultaneous withdrawal from both Korea and Vietnam. Due to Vietnamization US troops begun withdrawing since 1970, which had caused disagreement with the South Korean