The 213th Regional Support Group is a unit of the Pennsylvania Army National Guard. The 213th RSG mission is to provide command and control of the twenty-two separate Pennsylvania Army National Guard units assigned to the headquarters for operational and administrative control. This force consist of more than 1,000 soldiers from the eastern and central parts of the state. The 213th RSG is one of the two major commands in the Pennsylvania Army National Guard, the other being the 28th Infantry Division (Keystone).

The Pennsylvania Army National Guard, abbreviated PAARNG, is part of the United States Army National Guard and is based in the U.S. Commonwealth of Pennsylvania. Together with the Pennsylvania Air National Guard, it is directed by the Pennsylvania Department of Military and Veterans Affairs. The PAARNG maintains 124 armories and is present in 87 communities across the Commonwealth.