The Sixth Army attacked on Opposite the Sixth Army, , reserve position) the fourth defensive position built on the Somme, ran along a dip at the top of the shallow valley between the Saillisels and Le Transloy, in front of which the sunken road from Le Transloy to the Morval–Saillisel road, known as Baniska and Tours trenches, had also been fortified. On the right flank of the attack, the Saillisels were covered by the Prilip to the Portes de Fer and Négotin line just east of Rancourt, which met the west end of St Pierre Vaast wood at Reuss Trench and the Carlsbad, Terplitz and Berlin trenches about further back. A strong point around Bois Tripot and Château Sailly-Saillisel covered the southern approaches to the villages. The villages were bombarded by super-heavy ready for the attack on 7 October when the Fourth Army to the north attacked.