It was now two o'clock. So far General von Alvensleben had deceived the enemy with regard to the slenderness of his force by acting incessantly on the offensive. But the battle was now at a standstill, the battalions were visibly thinned, their strength was sapped by four hours of hard fighting, and the ammunition of the infantry was almost exhausted. Not a battalion, not a battery remained in reserve behind the fighting line standing there in the fire. It was now required to conserve the success won with so much blood by acting thenceforth on the defensive.
The left wing was in especial danger, being under the fire of the powerful artillery deployed on the Roman road. Their greatly superior numbers enabled the French to extend farther and farther to the right, threatening thus completely to envelop the Prussian flank.
Marshal Canrobert, in the French centre, had discerned the right moment to press forward against Vionville with all his might. At this critical instant there was on the German side only a small detachment of the 5th Cavalry Division available to check this effort. Two brigades had necessarily been sent to strengthen the left flank, and of the 12th Brigade remaining in rear of Vionville two squadrons had been detached to the Tronville copses. The two regiments ordered to undertake the task of charging the advancing enemy—the Magdeburg Cuirassiers and the Altmark Uhlans—were consequently each but three squadrons strong, in all 800 horses.
General von Bredow, commanding the 12th Cavalry Brigade, first traversed in column the shallow hollow sinking down from Vionville, then wheeled to the right and mounted the slope to the eastward, both his regiments on one front. Received immediately with heavy artillery and infantry fire, he threw himself on the hostile ranks. The first line is ridden over, the line of guns is broken through, gunners and teams are put to the sword. The second French line is powerless to resist this vigorous onslaught, and even the more distant batteries limbered up to drive away.
But the rapture of victory and the impetuosity of the charge carried the handful of troopers too far, and after a gallop of 3000 paces they found themselves surrounded by the French cavalry, which attacked them from all sides. There was no scope for a second charge, and so after several encounters with the French horse the brigade was forced to cut its way back through the French infantry, whose bullets accompanied it home. Only one-half of the command returned to Flavigny, where it was reorganized into two squadrons. The devoted self-sacrifice of the two heroic regiments effected the result, that the French entirely discontinued their attack on Vionville.
At three o'clock four of their Divisions advanced towards the Tronville copses. Barby's cavalry brigade (11th), watching the western verge, had to retire before the enemy's fire, and the German infantry occupying the wood also had to yield to a strength so superior; the batteries which were in action between Vionville and the copses were assailed in rear from the west through the glades of the copses, and were likewise forced to retire. But not until the lapse of an hour did the French succeed in overcoming the obstinate resistance of four staunch battalions.
At the subsequent roll-call near Tronville, it was ascertained that the 24th Regiment had lost 1000 men and 52 officers, and that the 2nd Battalion of the 20th Regiment had lost all its officers. The 37th demi-Brigade, which of its own accord had been fighting valiantly in support since noon, took possession of the village of Tronville and prepared it for an obstinate defence.
It was not till after three that the IIIrd Corps, which had been fighting for seven[9] hours almost single-handed, received effective assistance.
While the Xth Corps was on the march through Thiaucourt, its advanced guard heard cannon-fire from the direction of Vionville. The Corps Commander, General von Voigts-Rhetz, immediately set out for the battle-field, and having personally ascertained how matters stood, he sent back the requisite orders to his approaching troops.
In this instance again it was the artillery which, hurrying on in advance, masterfully struck into the conflict. Its fire, in conjunction with that of the promptly further advancing batteries of the IIIrd Corps, checked the French rush made on both sides of the Tronville copses simultaneously. At half-past three the head of von Woyna's Brigade (39th) fell on, drove the enemy back into the wood, and finally, supported by Diringshofen's Brigade (40th), took possession of its northern outskirts.