 The 1st Sustainment Brigade provides a full spectrum support including : configuring for , distributions and retrogrades to and from maneuver Brigade Combat Teams , other support brigades , and to joint interagency and multinational elements as directed . The 1st SB supports Early Entry Operations or Hub operations with augmentation , providing postal , replacement , and casualty operations as well as essential personnel services and Trial Defense Services on an area basis . The brigade is assigned as the sustainment unit of the 1st Infantry Division , however it can also operate independently , being assigned other units and other missions independent of the division . 
