Triangle Farm was overrun soon afterwards, when tanks drove the garrisons under cover from where they were unable to defend themselves. A female tank ditched from the Cockcroft at the crew dismounted their Lewis guns and dug in to wait for their infantry. The tank crews suffered and the attacking infantry of the expected the Germans suffered about and were taken prisoner. On 20 August, a special gas and smoke bombardment was fired by the British on Jehu Trench, beyond Lower Star Post, on the front of the 24th Division (II Corps). The 61st (2nd South Midland) Division (XIX Corps) took a German outpost near Somme Farm and on 21 August the 38th (Welsh) Division (XIV Corps), pushed forward its left flank.