Fighting began at 12.40 p.m. on Sunday the 23rd with a bombardment from between five and six hundred German guns along the whole twenty-five miles of front. It did surprisingly little damage in spite of the spotting by German aeroplanes; and when the German infantry came forward in massed formation, they discovered that their shelling had had no effect upon the moral of our troops or the accuracy of their rifle-fire. The Germans fought, of course, with obstinate courage and advanced again and again into the murderous fire of our rifles and machine guns and against occasional bayonet charges. But their own shooting went to pieces under the stress, and the frontal attack was a failure. Success there could not, however, ward off Von Buelow's threat to our right flank, and under the converging pressure Binche and then Mons itself had to be evacuated. But it was the long-delayed news of the French defeat and withdrawal on the whole of the rest of the line, coupled with more accurate information about the size of the German force, that determined the abandonment of the British position. Sir John French had to hold on till nightfall, but orders were given to prepare the way for retreat. The weary troops were to have a few hours' rest and start at daybreak. Their retreat was covered by a counter-attack soon after dawn by the First Division on the right which suggested to the Germans that we had been strongly reinforced and intended an offensive. Meanwhile Smith-Dorrien moved back five miles from the Canal, and then stood to protect the withdrawal of the First Division after its feint attack. It was a heavy task, and the 9th Lancers suffered severely in an attempt to hold up the Germans at Audregnies. But by Monday afternoon Haig's First Army Corps was back on the line between Maubeuge and Bavai, and Smith-Dorrien fell into line from Bavai westwards to Bry.