The lineage of 1-509th was reactivated provisionally in 1987 to serve as the OPFOR at the Joint Readiness Training Center at Fort Chaffee, Arkansas. The unit was activated at Little Rock Air Force Base in a formal ceremony on 21 May 1988. The unit was stationed at LRAFB because it provided modern quarters and facilities that Ft. Chaffee lacked, and it deployed on a per-rotation basis to Ft. Chaffee. The unit served and serves as the opposing force for American and Allied light infantry. In June 1993, 1-509th moved along with the Joint Readiness Training Center to Fort Polk, Louisiana. Since moving to Fort Polk, 1-509th Infantry has become an elite urban fighting training unit.