XXX Corps had led Eighth Army's pursuit across Tripolitana to Tunisia in early 1943. The advance was delayed by enemy demolition and mines, entailing much work for the sappers. In March XXX CTRE moved up to Tripoli to work on improving the road behind the advance, dealing with 68 demolitions and craters, one of which required a bridge of five spans. XXX Corps launched Eighth Army's assaults on the Mareth Line on 20 March and the Wadi Akarit position on 6 April. The Tunisian Campaign ended with the Axis surrender on 12 May.