The 21 Sustainment Command (US Army) is a logistical support unit within the United States Army. Its primary function is to provide operational and institutional sustainment capabilities, ensuring the readiness of combat forces through the distribution of supplies, services, and movement of resources. This command operates under the U.S. Army Materiel Command and is headquartered at Camp Arifjan, Kuwait. The 21 SC provides support to various U.S. Army units, both in garrison and during deployments, enabling them to focus on their primary mission: conducting military operations effectively and efficiently.