10th Engineer Battalion
Due to the Army's transformation towards a modular force, the 10th Engineer Battalion was deactivated in March, 2003.
The 10th Engineer Battalion was originally organized on 31 December 1861 in the Regular Army at Washington, District of Columbia, from new and existing companies of engineers as a provisional engineer battalion (constituted 28 July 1866 as the Battalion of Engineers).
It was expanded 14 March-7 June 1901 to form the 1st and 2nd Battalions of Engineers (2nd Battalion of Engineers -- hereafter separate lineage).
The 1st Battalion of Engineers was expanded, reorganized, and redesignated on 1 July 1916 as the 1st Regiment of Engineers.
The 1st Regiment of Engineers was expanded on 15 May 1917 to form the 1st, 6th, and 7th Regiments of Engineers (1st and 7th Regiments -- hereafter separate lineages)
The 6th Regiment of Engineers was redesignated on 29 August 1917 as the 6th Engineers. It was assigned on 1 October 1917 to the 3rd Division.
The regiment was broken up on 12 October 1939 and its elements were reorganized and redesignated as follows: The 2nd Battalion as the 10th Engineer Battalion, an element of the 3rd Division (later redesignated as the 3rd Infantry Division) (Headquarters and Headquarters and Service Company disbanded; 1st Battalion as the 6th Engineer Battalion -- hereafter separate lineage); and the 10th Engineer Battalion which was redesignated on 1 August 1942 as the 10th Engineer Combat Battalion.
The unit was redesignated on 1 March 1954 as the 10th Engineer Battalion. It was reassigned on 15 February 1996 to the 3rd Infantry Division.
