The 1st Devonshire Engineer Volunteer Corps, later the Devonshire Fortress Royal Engineers, was a volunteer unit of Britain's Royal Engineers whose history dated back to 1862. The unit helped to defend the vital naval base of Plymouth, and supplied detachments for service in the field in both World Wars. During the North African campaign in World War II, the unit's sappers distinguished themselves in bridging the Nile and clearing minefields during and after El Alamein. Their successors served on the postwar Territorial Army until 1969.