Meanwhile, at Plancenoit, further French reinforcements had recaptured the village and again lost it. The Sixth Corps had given way before the Prussian advance, as we have seen. The next French reinforcements, though they had at first thrust the Prussians back, in turn gave way as the last units of the enemy arrived, and the Prussian batteries were dropping shot right on to the fields which bordered the Brussels road.
Napoleon took eleven battalions of the Guard (the Imperial Guard was his reserve, and had not yet come into action[25]) and drew them up upon his flank to defend the Brussels road; with two more battalions he reinforced the wavering troops in Plancenoit. They cleared the enemy out of the village with the bayonet, and for the moment checked that pressure upon the flank and rear which could not but ultimately return.
It was somewhat past seven by the time all this was accomplished. Napoleon surveyed a field over which it was still just possible (in his judgment at least) to strike a blow that might save him. He saw, far upon the left, Hougomont in flames; in the centre, La Haye Sainte captured; on the right, the skirmishers advancing upon the slope before the English line; his eastern flank for the moment free of the Prussians, who had retired before the sudden charge of the Guard. He heard far off a cannonade which might be that of Grouchy.
But even as he looked upon his opportunity he saw one further thing that goaded him to an immediate hazard. Upon the north-eastern corner of his strained and bent-back line of battle, against the far, perilous, exposed angle of it, he saw new, quite unexpected hordes of men advancing. It was Ziethen debouching with the head of his First Prussian Army Corps at this latest hour--and Napoleon saw those most distant of his troops ready to yield to the new torrent.
The sun, now within an hour of setting, had shone out again. Its light came level down the shallow valley, but all that hollow was so filled with the smoke of recent discharges that the last stroke which Napoleon was now preparing was in part hidden from the Allies upon the hill. That final stake, the only venture left, was to be use of his last reserve and the charge of the Guard.