This is the eighth volume in a planned 10-volume operational and chronological series covering the Marine Corps' participation in the Vietnam War. A separate topical series will complement the operational histories. This particular volume details the gradual withdrawal in 1970-1971 of Marine combat forces from South Vietnam's northernmost corps area, I Corps, as part of an overall American strategy of turning the ground war against the North Vietnamese and Viet Cong over to the Armed Forces of the Republic of Vietnam. Marines in this period accomplished a number of difficult tasks. The III Marine Amphibious Force transferred most of its responsibilities in I Corps to the Army XXIV Corps, which became the senior U.S. command in that military region. III MAF continued a full range of military and pacification activities within Quang Nam Province, its remaining area of responsibility. Developing its combat and counterinsurgency techniques to their fullest extent, the force continued to protect the city of Da Nang, root out the enemy guerrillas and infrastructure from the country, and prevent enemy main forces from disrupting pacification. At the same time, its strength steadily diminished as Marine s redeployed in a series of increments until, in April 1971, the III Marine Amphibious Force Headquarters itself departed and was replaced for the last month of Marine ground combat by the 3d Marine Amphibious Brigade. During the redeployments, Marine logisticians successfully withdrew huge quantities of equipment and dismantled installation s or turned them over to the South Vietnamese. Yet this was also a time of troubles for Marines. The strains on the Armed Services of a lengthy, inconclusive war and the social and racial conflicts tormenting American society adversely affected Marine discipline and cohesion, posing complex, intractable problems of leadership and command. Marines departed Vietnam with a sense that they had done their duty, but also that they were leaving behind many problems unsolved and tasks not completed.