The Sustainment Command is a United States Army Logistics Headquarters. The Sustainment Command's primary mission is to command the Sustainment Brigades that provide combat support and combat service support in the areas of supply, maintenance, transportation, field services and the functional brigades or battalions that provide medical, general engineering & construction, smoke generation, biological detection and decontamination support. The command is designed to deploy into a theater of operations, assume command of the logistical units in place and provide oversight and materiel management. The command will report to a Theater Sustainment Command while in theater.