In an assault on the French front September 9, 1916, between Belloy-en-Santerre and Barleux the Germans by using jets of flame obtained a temporary footing in the French trenches, but were driven out by a vigorous counterattack with the loss of four machine guns. On the night of September 11, 1916, French forces north of the Somme took the offensive and drove a broad wedge right in between the powerfully defended German positions of Combles on the north and Peronne to the south. Continuing their advance on the following day, in less than half an hour they carried the German first line and, taking Hill 145 by the way, pressed on to the Bapaume road south of Rancourt, and held it as far south as Bouchavesnes village which was captured by a brilliant dash early in the evening. On September 13, 1916, the French again advanced, carrying several positions and occupying in this region the German third line. They also captured a trench system south of Combles. In the two days' fighting 2,300 German prisoners were captured. On the night of Thursday, September 13, 1916, the British forces won German trenches to the southeast of Thiepval and a heavily fortified place known as Wunderwerk. This was the prelude to a series of brilliant victories won by the British troops which had not been surpassed during the entire fighting in the Somme area. At 6 a. m. on September 15, 1916, the British attacked on a front of about six miles, extending from Bouleaux Wood east of Guillemont to the north of the Albert-Bapaume road. A tremendous bombardment of the enemy positions continued for twenty minutes before the infantry advanced to attack. The Germans were believed to have 1,000 guns concentrated in this sector which had been shelling the British positions for several days, but during this battle for some reason, perhaps lack of ammunition, they played an unimportant part, and were far outclassed by the British artillery. CHAPTER V THE "TANKS"--BRITISH CAPTURE MARTINPUICH