The Emperor now joined his victorious army, and Bazaine continued his retreat, which was to be by way of Verdun[129] to Châlons. There were four roads by which Bazaine might have marched through the chalk downs to Verdun, but he had ordered his whole army, 150,000 strong, to march by a single road until they reached the village of Gravelotte,[130] which stands seven miles west of Metz. I think you can form a good idea of what this meant. The road was hopelessly cumbered with guns and wagons, mounted men and foot soldiers, and this caused great confusion and delay. So long was the column that it took two days and nights to pass a given point. While it was slowly plodding up the sloping road to Gravelotte, the Emperor lay in a little inn near the village, and Bazaine went to see him. The old marshal was doubtful whether, after having been wounded, he was fit to command the army. "It is nothing," said Napoleon. "You have won a victory. You have broken the spell. Bring the army to Châlons, and all will yet be well." [Illustration: The Germans at Gravelotte. _From the picture by E. J. Hünten._] That was the difficulty--to bring the army to Châlons. I am sure you do not suppose that the Germans were idle while the French were slowly moving along the crowded road to Gravelotte. As soon as King William heard of the fight at Colombey he ordered his 2nd army to cross the Moselle at a point nine or ten miles south of Metz, from which the Roman road runs by way of Verdun to Châlons. When the army reached the river it discovered that the bridges had not been destroyed, and was therefore able to cross unmolested and hasten forward to cut off the French retreat. Not a moment was wasted. On the morning of Tuesday, August 16th, the French army left Gravelotte, and found before it two roads, both running across the downs to Châlons, the one a few miles to the north of the other. One column travelled by the northern road, the other by the southern road. Napoleon and the Prince Imperial sped along the more northern road in their carriage, and soon after bidding them farewell Bazaine learnt that great masses of Prussian troops were rapidly advancing northwards to cut him off. He halted some of his troops, and rode on towards the first village on the road--Rezonville.[131] At that time the leading cavalry of the French were at the village of Mars-la-Tour, some miles farther along the same road. One German corps struck at the left of the French line, while another tried to turn its flank at Mars-la-Tour. The battle was long and fierce, and both sides claimed the victory. Bazaine telegraphed to the Emperor: "The enemy left us masters of the battlefield;" while Moltke sent the following message to King William: "Our troops, worn out by a twelve hours' struggle, encamped on the victorious field, opposite the French lines."