Following the 1965 buildup, the U.S. Army became more involved in pacification. It supported the other war in three interrelated ways. Involvement in civil affairs—that is, in efforts to improve rural living conditions—was one. A second, the use of American forces to help provide security, complemented the first, although attrition of the enemy's battalions and regiments absorbed the preponderance of the army's resources. A third was the work of advisers, who carried out liaison with South Vietnam's civil and military authorities responsible for pacification.