Security assistance "promotes regional stability, deters aggression, maintains alliances, and disseminates democratic values between the United States and its allies".

[3] In carrying out the Army security assistance mission, USASAC calls on all AMC Life Cycle Management Commands, as well as other Department of Defense agencies and U.S. industry for support.

Each sale of equipment to overseas customers comprises the same "total package" of quality material, spare parts, training, publications, technical documentation, maintenance support, and other services that AMC provides to U.S. Army units.

USASAC helped provide Iraq with weapons and ammunition, including Hellfire missiles, after it requested them in order to respond to increased domestic violence.

On 1 October 2001, USASAC relocated its headquarters to Fort Belvoir, Virginia, completing a planned move onto government-owned property.

Due to the 2005 Base Realignment and Closure Commission report, both Army Materiel Command and USASAC headquarters were relocated to Redstone Arsenal in Huntsville, Alabama.

The USASAC has served 140 allies and friendly countries and multinational organizations, with support by AMC, other DOD agencies, and in partnership with U.S. industry, USASAC provides materiel, training, education and, other services to help our allies strengthen their defensive capabilities, deter aggression, achieve regional stability, and promote democratic values.