640th RSC

• Origins and Establishment: The 640th Regional Support Group (RSG), formerly 640th Regional Support Command (RSC), traces its lineage to support commands activated during the post-Cold War restructuring of the U.S. Army Reserve. • Headquarters Location: The 640th RSG is headquartered in Los Alamitos, California, providing essential support services to Reserve units across the Western United States. • Primary Mission: The unit’s mission focuses on base operations support, including logistics, supply, transportation, and facility management for Army Reserve units within its area of responsibility. • Operational Deployments: Elements of the 640th have deployed in support of Operations Iraqi Freedom and Enduring Freedom, providing logistical support and sustainment operations overseas. • Humanitarian Assistance: The unit has participated in domestic humanitarian missions, including disaster relief efforts following wildfires and floods in California and other western states. • Unit Motto: The 640th RSG’s motto is “Support the Warrior,” reflecting its commitment to sustaining the operational readiness of Army Reserve soldiers. • Command Structure: The 640th falls under the 311th Sustainment Command (Expeditionary), which is part of the Army Reserve’s 79th Theater Sustainment Command. • Training and Exercises: The 640th regularly participates in large-scale exercises such as Combat Support Training Exercises (CSTX), enhancing its readiness to support real-world missions. • Integration with Civil Authorities: The unit often trains and coordinates with local, state, and federal emergency management agencies to improve joint response capabilities. • Legacy of Support: Over the decades, the 640th RSG has earned recognition for its consistent and reliable support to both military operations abroad and civil emergencies at home, exemplifying the vital role of Army Reserve sustainment units.