• Originated on 14 September 1866, in
St. Thomas, Canada West, as the 25th Elgin Battalion of Infantry. • Redesignated on 8 May 1900, as the 25th Elgin Regiment. • Redesignated on 17 May 1904, as the 25th Regiment. • Redesignated on 29 March 1920, as The Elgin Regiment. • Redesignated on 7 November 1940, as The Elgin Regiment (Reserve). • Redesignated on 15 February 1946, as The Elgin Regiment, RCIC. • Converted to armour on 1 October 1954, and redesignated as The Elgin Regiment (27th Armoured Regiment). • Redesignated on 19 May 1958, as The Elgin Regiment (RCAC). • Converted to engineers on 14 August 1997, and redesignated as the 31 Combat Engineer Regiment (The Elgin's). == Organization ==