In this attack, the Imperial Guard was supported on its left flank neither by cavalry nor by the infantry of Reille’s Corps. Had either been employed, the disaster could not have happened. A charge of cavalry would have forced the 52d to form square; an advance of Bachelu’s division, or a part of it, would have engaged all the attention of Adam’s brigade, and permitted the Guard to pursue its way unmolested to the crest of the hill. What would have succeeded the repulse and defeat of the Imperial Guard had the Prussians not interposed, no one of course can tell. But while these movements were going on, about 7.30 P.M., the van of Zieten’s Corps reached Papelotte;[748] and the division of Steinmetz, supported by cavalry and artillery, turning at once the right of the 1st Corps and the left of the 6th, advanced upon the field of battle, spreading terror and confusion throughout the right wing of the French army. Durutte’s and Marcognet’s divisions abandoned their positions; Lobau retired towards Planchenoit; while the immense success which the English had obtained over the French left in routing the Imperial Guard was instantly improved by Wellington in ordering his two remaining and as yet untouched cavalry brigades, those of Vivian and Vandeleur, to charge. These bodies of horse, which had been, in the latter part of the afternoon, brought over from the English left to the rear of their centre, were now launched upon the troops of Donzelot and Quiot, and the remains of the French cavalry; and then the Duke, seeing that the battle was won, ordered the whole line to advance. (See Map 12.)