The sword was now again brandished, not to be sheathed or reposed, until the one party or the other should be irretrievably defeated.The situation of Buonaparte, even after the victory of Montereau, and capture of Troyes, was most discouraging. If he advanced on the grand army of the allies which he had in front, there was every likelihood that they would retire before him, wasting his force in skirmishes, without a possibility of his being able to force them to a general action; while, in the meantime, it might be reckoned for certain that Blucher, master of the Marne, would march upon Paris. On the contrary, if Napoleon moved with his chief force against Blucher, he had, in like manner, to apprehend that Schwartzenberg would resume the route upon Paris by way of the valley of the Seine. Thus, he could make no exertion upon the one side, without exposing the capital to danger on the other.After weighing all the disadvantages on either side, Napoleon determined to turn his arms against Blucher, as most hostile to his person, most rapid in his movements, and most persevering in his purposes. He left Oudinot, Macdonald, and Gerard in front of the grand army, in hopes that, however inferior in numbers, they might be able to impose upon Schwartzenberg a belief that Napoleon was present in person, and thus either induce the Austrian to continue his retreat, or at least prevent him from resuming the offensive. For this purpose the French troops were to move on Bar-sur-Aube, and occupy, if practicable, the heights in that neighbourhood. The soldiers were also to use the cry of Vive l'Empereur, as if Napoleon had been present. It was afterwards seen, that as the maréchals did not command, men in all, including a force under Macdonald, it was impossible for them to discharge effectually the part assigned them.