TRICARE, formerly known as the Civilian Health an Medical Program of the Uniformed Services (CHAMPUS), is the managed care component of the United States Department of Defense Military Health System. TRICARE provides civilian health benefits for military personnel, military retirees, and their dependents, including some members of the Reserve Component. The TRICARE program is managed by TRICARE Management Activity (TMA) under the authority of the Assistant Secretary of Defense (Health Affairs). TRICARE is the civilian care component of the Military Health System although historically, it also included health care delivered in the military medical treatment facilities.