4 Engineer Support Regiment • Originated on 17 June 1977, in
Lahr, Germany, as 4 Combat Engineer Regiment. • Redesignated on 4 September 1992, as 4th Engineer Support Regiment. • Redesignated on 30 September 1993, as 4 Engineer Support Regiment.
4 Field Engineer Squadron • Originated on 1 August 1951, in
Petawawa, Ontario, as 59th Independent Field Squadron, RCE. • Redesignated on 16 October 1953, as 4th Field Squadron, RCE. • Redesignated on 30 April 1958, as 4 Field Squadron. • Redesignated on 21 May 1975, as 4 Field Engineer Squadron. • Reorganized as a regiment on 17 June 1977, and Designated as 4 Combat Engineer Regiment. == Sub-units ==