14 Mar 1941 - 24 Feb 1942 - 504th Parachute Battalion

24 Feb 1942 - 02 Nov 1942 - 2nd Battalion, 503rd Parachute Infantry Regiment

02 Nov 1942 - 10 Dec 1943 - 2nd Battalion, 509th Parachute Infantry Regiment

10 Dec 1943 - 01 Mar 1945 - 509th Parachute Infantry Battalion

12 May 1947 - 27 Mar 1963 - 509th Parachute Infantry Battalion

27 Mar 1963 - 01 Sep 1973 - 1-509th Airborne/Mechanized Infantry, 1st Brigade, 8th ID - Mainz, Germany

27 Mar 1963 - 01 Sep 1973 - 2-509th Airborne/Mechanized Infantry, 1st Brigade, 8th ID - Mainz, Germany

27 Mar 1963 - 01 Sep 1973 - 3-509th Infantry (Airborne) - Mainz, Germany

01 Sep 1973 - 01 Jul 1983 - 1-509th Airborne Battalion Combat Team, SETAF - Vicenza, Italy

01 Jul 1975 - 31 May 1993 - C Company (Pathfinder) 509th Infantry

16 Jan 1986 - 31 May 1993 - 1-509th Infantry, JRTC OPFOR - Little Rock AFB, Arkansas

15 Jan 1994 to Present - 1-509th Infantry, JRTC OPFOR - Fort Polk, Louisiana

10 Sep 2004 - Present - 3-509th Infantry Regiment, 4th Brigade, 25th ID - Fort Richardson, Alaska