De France's Brigade allowed the enemy to approach within 150 paces, and then its Lancer regiment rushed impetuously upon the Hanoverian Uhlans; but the latter outflanked it, and received unexpected assistance from the 5th squadron of the 2nd Guard Dragoons, which, returning from a reconnaissance, plunged forward over fences and ditches and fell upon the enemy in flank, while the Westphalian Cuirassiers at the same time broke his front. The Chasseurs d'Afrique strove in vain to hinder the enveloping tactics of the Hanoverian Dragoons; the clouds of dust drifted farther and farther northward, and the whole mass of French horse drew away towards the wooded slopes of Bruville, behind which there were still five regiments of Clerembault's Cavalry Division. Clerembault permitted one of his brigades to cross the valley, but the fleeing Hussars and some misunderstood signals threw it into confusion. It was borne back, and not until the French infantry confronted the Prussian pursuers in the covering valley did the latter desist from the pursuit. The Prussian regiments quietly re-formed and then withdrew at a walk to Mars la Tour, followed at a great distance by part of Clerembault's Division. This, the greatest cavalry combat of the war, had the effect of making the French right wing give up all further attempts to act on the offensive. The Germans mourned the loss of many superior officers, who always, at the head of their men, had set them a glorious example. Prince Frederick Charles had hastened to the field of battle. The day was nearly at an end, darkness approaching, and the battle won. The Prussians in the evening stood on the ground which in the morning had been occupied by the French. Though General von Alvensleben had in the first instance been under the impression that he would have only the French rear-guard to deal with, he did not hesitate for a moment to become the assailant when he found the entire French Army before him. With his single Corps he maintained the fight till the afternoon, and drove back the enemy from Flavigny to Rezonville, a distance of more than two miles. This was one of the most brilliant achievements of all the war. Thanks to the valuable assistance of the Xth Corps it was possible to carry on the battle through the afternoon on the defensive, but only by most resolute counter-attacks by the cavalry, and by the unflinching tenacity of the artillery. It was clearly most unadvisable to challenge by renewed attacks an enemy who still outnumbered the Germans; which action, since no further reinforcements could be hoped for, could not but jeopardize the success so dearly bought. The troops were exhausted, most of their ammunition was spent, the horses had been under the saddle for fifteen hours without fodder; some of the batteries could only move at a walk, and the nearest Army Corps on the left bank of the Moselle, the XIIth,[10] was distant more than a day's march.