The next Axis defence line was along Wadi Akarit. The barrage for 51st (H) Division's assault began at 04.15 on 6 April, followed by four other barrages over five hours, one involving a difficult change of direction, and the division's attack, in the words of the "Official History", 'went like clockwork'. Axis troops then began counter-attacks and the Highlanders had to fight hard to hold their gains. The pursuit was resumed the following day, through Sfax, after which the divisional artillery was in action in the hill country near Enfidaville. This lasted until the fall of Tunis and the end of the campaign on 15 May.