Every prudent commander prepares for a retreat, for no general can possibly be sure of winning any battle. Napoleon once said that the general who went forward without having prepared a line of retreat deserved to be shot. Wellington, you will remember, retreated from Quatre Bras, and afterwards won one of the greatest battles of history. He had previously arranged to meet Blücher and give battle to the French at Waterloo, where there was ground favourable to him. In the same way General French had chosen and prepared a second position some miles to his rear, and to this line he now prepared to retire. In his first dispatch he tells us that the new position extended from the fortress of Maubeuge on the east to Jenlain on the west. It was not a good position, because there were so many standing crops and buildings that the trenches could not be well placed, and the field of fire was impeded. There were, however, a few places where the big guns could be posted well. [Illustration: Bird's-eye View of the British Line of Retreat from Mons to La Fère _By permission of the Sphere_.] A general order was issued that the troops were to move to the rear at sunrise on Monday, 24th August; but many of them were roused from their sleep and sent on their southward march before midnight on the 23rd. Already the heavy transports and the ambulances filled with wounded were moving as rapidly as possible towards the new position, so that the roads might be free for the infantry next day. You can easily understand that, if the British had been suddenly withdrawn, the Germans would have swooped down on them while they were marching in columns and unable to resist. Before the retirement could begin in real earnest our troops must check the Germans, and thus gain sufficient time to reach the new position before they were again attacked in force. You will remember that Binche had been abandoned, and that Sir Douglas Haig's force had fallen back to a long swell of ground south of the village of Bray. In the gray dawn of Monday morning the British troops, who had done a certain amount of fighting during the night, stood to arms. The Germans were preparing for a great attack on the British right, and in this direction Sir John French determined to check them. He ordered the 2nd Division of the First Corps, with a strong support of more than 120 guns, to advance and make an attack on Binche, as though they were determined to recapture it. Meanwhile Smith-Dorrien's Second Corps, which had held the line of the canal, was to fall back some distance and there form a new battle line, behind which the 1st Division, which had been so hard pressed during the previous day's battle, might retire to the new position. When this division was well upon its way, the Second Corps was to retreat and form up upon its left.