Part of the British Expeditionary Force (BEF) evacuated at Dunkirk as part of Operation Dynamo before posted to Africa. The 2nd Battle of Longstop Hill or the Capture of Longstop Hill took place in Tunisia during the Tunisia Campaign from 21 to 23 April 1943. The battle was fought for control over the heights of Djebel el Ahmera and Djebel Rhar, together known as Longstop Hill and vicinity, between the British forces of the First Army and German units of the 5th Panzer Army. The infantry of the 78th Battleaxe Division and Churchill tanks of the North Irish Horse captured Longstop Hill after bitter fighting, in which the tanks created a measure of tactical surprise by driving up the hill, a manoeuvre that only Churchill tanks could achieve. The attackers broke through the German defences, which were the last great natural barrier on the road to Tunis.