sentences:  Sustainment Brigades in the United States Army
  
  As part of the early 21st century transformation of the United States Army from a division-based structure to a brigade-based army; the division support commands, corps support groups, and area support groups were inactivated and transformed to sustainment brigades (previously called sustainment units of action (SUS or SUA).The sustainment brigade is designed to provide mission command for combat support and combat service support units.