The British main front of attack extended from Maricourt on our right, round the salient at Fricourt, to the Ancre in front of St. Pierre Divion. To assist this main attack by holding the enemy's reserves and occupying his artillery, the enemy's trenches north of the Ancre, as far as Serre, inclusive, were to be assaulted simultaneously, while further north a subsidiary attack was to be made on both sides of the salient at Gommecourt. [Sidenote: Rawlinson and Allenby.] I had intrusted the attack on the front from Maricourt to Serre to the Fourth Army, under the command of General Sir Henry S. Rawlinson, Bart., K. C. B., K. C. V. O., with five army corps at his disposal. The subsidiary attack at Gommecourt was carried out by troops from the army commanded by General Sir E. H. H. Allenby, K. C. B. [Sidenote: Mines exploded under enemy lines.] [Sidenote: Advance over open ground.] [Sidenote: Trenches taken near Fricourt.] Just prior to the attack the mines which had been prepared under the enemy's lines were exploded, and smoke was discharged at many places along our front. Through this smoke our infantry advanced to the attack with the utmost steadiness in spite of the very heavy barrage of the enemy's guns. On our right our troops met with immediate success, and rapid progress was made. Before midday Montauban had been carried, and shortly afterward the Briqueterie, to the east, and the whole of the ridge to the west of the village were in our hands. Opposite Mametz part of our assembly trenches had been practically leveled by the enemy artillery, making it necessary for our infantry to advance to the attack across 400 yards of open ground. None the less they forced their way into Mametz, and reached their objective in the valley beyond, first throwing out a defensive flank toward Fricourt on their left. At the same time the enemy's trenches were entered north of Fricourt, so that the enemy's garrison in that village was pressed on three sides. Further north, though the village of La Boisselle and Ovillers for the time being resisted our attack, our troops drove deeply into the German lines on the flanks of these strongholds, and so paved the way for their capture later. [Sidenote: Fight for the Leipsic Salient.] On the spur running south from Thiepval the work known as the Leipsic Salient was stormed, and severe fighting took place for the possession of the village and its defenses. Here and north of the valley of the Ancre, as far as Serre, on the left flank of our attack, our initial successes were not sustained. Striking progress was made at many points, and parties of troops penetrated the enemy's positions to the outer defenses of Grandcourt, and also to Pendant Copse and Serre; but the enemy's continued resistance at Thiepval and Beaumont Hamel made it impossible to forward reinforcements and ammunition, and in spite of their gallant efforts our troops were forced to withdraw during the night to their own lines.