The first thing to note is that the fortress of Maubeuge, with its garrison of reserve and second line men, had, of course, been at once invested by the Germans when the British and French line had fallen behind it and left it isolated. The imperfection of this fortress I have already described, and the causes of that imperfection. Maubeuge commanded the great railway line leading from Belgium to Paris, which is the main avenue of supply for an invasion or for a retreat, running north-east to south-west on the Belgian frontier upon the capital. The 5th French Army retired parallel to the British along the belt marked in Sketch Map 60 by diagonal lines. At first, as its retirement had begun earlier, it was behind, or to the south of, the British, who were thus left almost unsupported. It lay, for instance, on Monday, the 24th, much along the position 1, at which moment the British Army was lying along the position 2. That was the day on which the Germans attempted to drive the British into Maubeuge. But during the succeeding two days the French 5th Army (to which the five corps, including the Prussian Guard, under Buelow, were opposed) held the enemy fairly well. They were losing, of course, heavily in stragglers, in abandoned wounded, and in guns; but their retreat was sufficiently strongly organized to keep this section of the line well bent up northwards, and just before the British halted for their first breathing space along the line La Fère and Noyon, the French 5th Army attempted, and succeeded in, a sharp local attack against the superior forces that were pursuing them. This local attack was undertaken from about the position marked 3 on Sketch 60, and was directed against Guise. It was undertaken by the 1st and 3rd French Corps, under General Maunoury. He, acting under Lanrezac, gave such a blow to the Prussian Guard that he here bent the Prussian line right in.