Before the hour set for the advance the British troops who took Courcelette were strongly attacked by the Germans on the front just north of the Bapaume road. The British front-line trench was broken by the attack, and hard fighting was in progress when the hour set for the British advance arrived. Then from support lines and other positions to the rear of the trench the Germans had entered the British troops swept forward. The Germans were overwhelmed as the waves of khaki-clad, cheering men rushed forward and over them and out beyond the objective points as originally planned. In front of Courcelette there were formidable German positions; two trenches in particular which had been strongly fortified and against which the British troops for a time hurled themselves in vain. Twice the British troops were driven back, but the third assault was entirely successful, the British troops sweeping over the two trenches and into the outskirts of Courcelette. By 8.10 o'clock the British forces had worked clear through the village ruins and had carried two especially strong positions on the farther side, a quarry on the north and a cemetery on the northeast of the village. In the High Wood area, to the right of the two attacks described, the Germans had converted a large mine crater into a fortress of formidable strength, for from this position they could sweep the entire wood with machine guns so placed that the British were powerless to reach them. The "tanks" were of great efficiency in reducing this strong point on the eastern angle of the wood. The British troops fighting every yard of the way, slowly encircled the wood, which was still full of cunningly hidden machine guns, and then went steadily through it. This wood, which was described as a horrible place, with its heaps of dead and shattered defenses, was effectually cleaned out by the British and occupied by them, and a line was established due north of the farthest extremity for about 1,000 yards. Flers was captured by the British by successive pushes in which the "tanks" again demonstrated their value. Leading the way, these monsters waddled through the village, shattering barricades, crushing their way through masonry and creating general alarm among the German troops, who saw these formidable war engines for the first time. In the capture of Courcelette, Flers, and Martinpuich the British air service successfully cooperated with the movements of the artillery and infantry. During the day, September 15, 1916, thirteen German aeroplanes and kite balloons were destroyed, and nine others were driven down in a damaged condition. The British reported that four of their machines were lost.