That battle was the principal British effort, and it only fell short of a real victory because the reserves were not on the spot to follow up the initial success which might almost seem to have surprised the higher command. The front extended from the La Bassée Canal to the outskirts of Lens, and as in Champagne the attack on 25 September was preceded by an intense bombardment which destroyed the first German trenches and wire-entanglements. Nearly everywhere the advance was at first successful. The Hohenzollern redoubt was captured, the Lens-La Bassée road was crossed, and even Haisnes and Hulluch reached. But the greatest success was farthest south, where the village of Loos was rushed by the 15th Division and then Hill 70. Even there the Highlanders would not stop, but went on impetuously as far as the Cité St. Auguste, well outflanking Lens and past the hindmost of the German lines. This was all by 9.30 a.m., within four hours of the first attack. But there were no reserves at hand to consolidate the victory and hold up the German counter-attacks. There were plenty miles away in the rear, retained by Sir John French because along the extended line of attack from Ypres to Lens it was not known where they would most be needed; and even when the need was clear, interrupted telephones and defective staff-work caused confusion and delay. Eventually the 11th Corps fresh from England and to fighting was marched eight miles and put into the battle line without sufficient food or water. Gradually our troops were pushed back from Hill 70, across the Lens-La Bassée road, and out of the Hohenzollern redoubt. The line was restored to some extent by the Guards on the 27th, and Loos remained firmly in our hands; but a great opportunity had been lost, and the great stroke of the 15th Division had not been turned into a great advance. Lens had been almost in our grasp, and with it a lever to loosen the German hold on Lille (see Map, p. 79).