For the purposes of attack, the front was divided into four sections. The right and right centre sections were allotted to the 109th and 108th Brigades respectively. The left centre section, bounded by a line drawn from the north corner of Thiepval Wood just north of B 19, C 11, and D 11, and the Ancre, was, owing to the great frontage of the 36th Division, not to be attacked directly. The left section, on the right bank of the Ancre, was allotted to the 108th Brigade. This Brigade had attached to it one battalion of the 107th. It was to employ three battalions in the right centre section, and two in the left section. The 107th Brigade (less one battalion) was in Divisional Reserve. The task of the 109th Brigade in the right section was to attack the "A" and "B" lines within its section,[22] and to advance to a line drawn from C 8 through B 16 to the Grandcourt-Thiepval Road at C 9; there to halt and consolidate. For this purpose General Shuter was attacking with two battalions, the 9th Inniskillings on the right, the 10th on the left, in first line; and the two remaining, 11th Inniskillings on right and 14th Rifles on left, in second. The two first were to take and consolidate the final objective, the rear battalions to hold the "A" and "B" lines and to send up liaison patrols to get touch with the leading battalions. The most important task of the 11th Inniskillings was the fortification of the Crucifix on the Thiepval-Grandcourt Road. The task of the 108th Brigade in the right centre section was to clear the "A" and "B" lines within the section, and advance to the "C" line, halting and consolidating on the salient C 9, C 10, C 11, the north-east corner of the Schwaben Redoubt. A special detachment, with one Stokes mortar, one Lewis and one Vickers gun, was to act as left flank guard, to clear the communication trench from B 19 to C 12, holding the latter as a defensive post, and sending a detachment down to C 13, to ensure observation and fire on the Grandcourt-St. Pierre Divion Road. In addition, two officers' patrols, each a platoon in strength, with a Lewis gun, were to reconnoitre and clear the left of the "A" and "B" lines up to St. Pierre Divion. General Griffith was attacking here with the 11th Rifles on the right, the 13th on the left, and the 15th Rifles of the 107th Brigade, attached, in support.