(Click on the dates to learn more on the history of the 509th)
(Click on the dates to learn more on the history of the 509th)
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
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12 May 1947 - 27 Mar 1963 - 509th Parachute Infantry Battalion
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27 Mar 1963 - 01 Sep 1973 - 1-509th Airborne/Mechanized Infantry, 1st Brigade, 8th ID 27 Mar 1963 - 01 Sep 1973 - 2-509th Airborne/Mechanized Infantry, 1st Brigade, 8th ID 01 Apr 1963 - 31 Aug 1973 - 3-509th Parachute Infantry
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01 Sep 1973 - 01 Jul 1983 - 1-509th Airborne Battalion Combat Team, SETAF
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01 Jul 1975 - 31 May 1993 - C Company 509th Parachute Infantry Regiment (Pathfinders)
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16 Jan 1986 - Pres - 1-509th Airborne Infantry, JRTC OPFOR
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| 10 Sep 2004 - Pres - 3-509th Infantry Regiment, 4th Brigade, 25th ID
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