When the news of the double disaster of August 6th reached the Imperial Head-quarter, the first impression there was that it would be necessary to retreat immediately on Châlons with Bazaine's army; and the VIth Corps, a portion of which was already being transported thence to Metz, was ordered to retrace its steps. But this resolution was presently retracted. The Emperor had not merely to consider the foreign enemy, but public opinion within his own realm. The sacrifice of entire provinces at the very beginning of a war which had been undertaken with such high anticipations, would have provoked the unbounded indignation of the French people. There were still 200,000 men who could be brought together in front of the Moselle, supported by a large fortress, and though the enemy would still have the superiority in numbers, his army was holding a line nearly sixty miles long. It had yet to cross the Moselle, and this would necessitate a dislocation which might create a weakness at the critical moment.
In the IIIrd German Army the disorderly condition of the defeated enemy was not known, nor even the direction of his retreat. It was expected that MacMahon's Army would be found rallied on the farther side of the Vosges for renewed resistance; and as it was impossible to cross the mountains except in detached columns, the German advance was very cautious, and by short marches only. Though the distance between Reichshofen and the Saar is not more than about twenty-eight miles in a straight line, that river was only reached in five days. Nothing was seen of the enemy, except in the fortified places, small indeed, but too strong to be taken by storm, which command the highways in the mountains. Bitsch had to be avoided by a fatiguing circuit, Lichtenberg was captured by surprise, Lützelstein had been abandoned by its garrison, the investment of Pfalzburg was handed over to the approaching VIth Corps, and Marsal capitulated after a short resistance.
The German left wing had no enemy before it, and could be brought into closer connection with the centre. To bring the three armies abreast of each other a wheel to the right was requisite. The advance of the Ist and IInd Armies had, however, to be delayed, as the IIIrd did not reach the Saar until August 12th. The whole movement was so arranged that the IIIrd Army was to use the roads by Saarunion and Dieuze, and to southward; the IInd those by St. Avold and Nomény and to southward; the Ist those by Saarlouis and Les Etangs, the last also taking the direction of Metz.