After a time some of the officers and Arista, who exposed himself bravely throughout the battle, induced these troops to go back, and as they were still in much confusion, the remnants of Noriega's corps, reinforced with 200 men from Torrejón, were ordered to support them. The cavalry, however, badly demoralized themselves, dashed blindly at a trot against the infantry; the resulting disorder extended even to the Tampico men; and these desperate corps, ordered to charge as the only possible way to prevent them from bolting, moved forward aimlessly in succession. Duncan, when he saw this large force advance, withdrew a little, still firing; but soon under cover of the smoke he came up again, and gained an enfilading position. Suddenly with a sharp crack his guns opened, and against the fading horizon his shells and shrapnel could be seen bursting, with almost the regularity of signal rockets, over those dark masses. Driven like sheep by this fire, the Mexican right wing turned toward the left and hurried across the entire field, presenting their flank and to some extent their rear to the Americans at a distance of 200 paces or even less, while, in a somewhat more orderly manner, the First Infantry, which stood next in line, followed them. Now was the time to decide the battle; but, though Taylor had come to this part of the field, nothing could be done, for it was feared that should a charge be made, the enemy's cavalry might reach the wagons, and cripple our army by destroying the provisions. Indeed, the Americans appear to have drawn back a little toward the train; and the disordered Mexicans, having reached the extreme left and finally the rear of their line, were re-formed.[8.14] It was now about seven o'clock. The Americans had lost five killed and forty-three wounded, and the Mexicans probably seven times as many. The afterglow of sunset lighted up the dun clouds of smoke. Darkness was close at hand. Necessarily, therefore, the struggle ended; and while the Mexicans retired through the chaparral to the low eminence behind the original position of their right wing, and there camped in order of battle, the Americans bivouacked where they stood, or in the fitful glare of the still burning grass gave attention to such of both armies as could be discovered lying on the field. At last the prairie fire burned out; the smoke of battle drifted away; the full moon appeared; and the tired troops, watched over by pacing guards, slept between the stacks of arms like images.[8.14]