Constituted 13 February 1951 in the Organized Reserve Corps as Headquarters and Headquarters Company, 420th Engineer Aviation Brigade Activated 15 February 1951 at College Station, Texas Reorganized and redesignated 30 April 1953 as Headquarters and Headquarters Company, 420th Engineer Brigade Redesignated 8 November 1955 as Headquarters and Headquarters Company, 420th Engineer Aviation Brigade Redesignated 15 January 1957 as Headquarters and Headquarters Company, 420th Engineer Brigade Location changed 3 November 1958 to Bryan, Texas Ordered into active military service 7 December 2003 at Bryan, Texas; released from active military service 3 June 2005 and reverted to reserve status Ordered into active military service 15 March 2008 at Bryan, Texas
Campaign participation credit
War on Terrorism The 980th Engineer Battalion spent time in Iraq from 2004-2005 The 489th Engineer Battalion spent time in Iraq from 2003-2004 and in Afghanistan from 2013 - 2014. - A Co, B Co, C Co, D Co, HHC, FSC The 341st Engineer Co. spent time in Iraq from 2008–2009. The 688th Engineer Co. spent time in Iraq from 2008–2009. The 955th Engineer Co. spent time in Iraq from 2008–2009 and in Afghanistan 2013-2014. The 277st Engineer Co. spent time in Iraq from 2009–2010. The 401st Engineer Co. spent time in Iraq from 2009–2010. 15 man Forward detachment spent time in Iraq,Syria,and Kuwait 2018-2019 in support of Operation Inherent resolve. The 806th Engineer Co. spent time in Afghanistan from 2010–2011. The 980th Engineer Battalion spent time in Afghanistan from 2011–2012. The 721st Engineer Co. spent time in Afghanistan from 2011- 2012 andin 2018-2019. The 321st Engineer Co. spent time in Afghanistan from 2012–2013. The 704th Engineer Co. spent time in Afghanistan from 2012–2013. A detachment of the 808th Engineer Co. spent time in Afghanistan from 2013–2014. The 606 Engineering Facilities Detachment spent time in Afghanistan from 2014–2015. The 420th Engineer Brigade Headquarters and Headquarters Company deployed to Kuwait as the Theater Engineer Brigade in support of Operation Spartan Shield in March 2017. The 961st Engineer BN spent time in Kuwait, Iraq & Syria from 2018–2019 in support of Operation Inherent Resolve. D Co, 299th Engineer Battalion deployed for Operations Desert Shield, Desert Storm and Provide Comfort. Awarded Multiple Purple Hearts, CAB's, Bronze Stars, NAM's, and many other awards