When each unit deploys, there is always a detachment of soldiers from that unit that remain in the rear (at the duty station). These soldiers are responsible for keeping the unit running at the duty station as well as providing a link between the deployed unit and the FRG (Family Readiness Group).
Typically, there is an officer who is appointed as the Rear D (Rear Detachment) commander. This is rarely the unit’s normal commander. When there is information about the unit, it typically flows as follows:
Chain of Command Overseas –> Rear D Commander –> FRG Leader –> POC/Key Callers –> Family Members
Rear D will also help to coordinate resources that are needed to take care of Army spouses and family members. They can also assist with any pay issues or other concerns during a deployment.
Members of Rear D usually help to conduct official FRG meetings as well. It is important to have the contact information for Rear D as well as for the FRG when your soldier is deployed.