On the German side four Corps of the IIIrd Army were now within nine miles rearward of the Army of the Meuse. The 5th Cavalry Division stood at Attigny on the enemy's line of communication; the 6th was hanging on the heels of the French columns of march, and, among other things, had taken Boncq with a dismounted party. The Royal Head-quarter was now advanced to Grand Pré, and, as the result of the various reports which had poured in, the resolution was taken to attack the enemy on the following day, before he should cross the Meuse. The Army of the Meuse was to march towards Beaumont, the IIIrd Army to move forward between that place and Le Chêne. To bring both armies to a parallel front, the right wing was not to move until ten o'clock, while the left[18] was to start before six o'clock. Only the trains absolutely requisite for the battle were to follow.
[18] The Army of the Meuse constituted the right wing; the IIIrd Army, the left.
On the 30th of August, at ten o'clock, the King set out for Sommauthe by way of Buzancy. Both the Bavarian Corps were on the march thither, the Vth Corps advanced in the centre towards Oches, the XIth, together with the Würtemberg Division, was heading for Le Chêne, the VIth for Vouziers. The IVth Corps on the right was advancing by Belval, the XIIth reached to the Meuse, while the Guard Corps followed in rear as a reserve.
Marshal MacMahon had issued orders for the attainment of the object that his entire army should on this day cross to the right bank of the Meuse; only the baggage trains and sick were to remain behind.
His Ist Corps and the 2nd Cavalry Division had left Raucourt so early as seven; they crossed the river at Remilly, light bridges having been thrown over for the infantry. The VIIth Corps at Oches had struck camp still earlier at four o'clock, but as it took with it in the march all its waggons, even the empty ones, the trains formed a column more than nine miles in length, and seven of its battalions were forced to march alongside the road in the capacity of baggage guard; so that the brigade bringing up the rear was unable to start until ten o'clock. This long procession soon came into contact with the Prussian cavalry, was fired upon by artillery, and compelled to arrest its march. Not till one o'clock could the movement on La Besace be resumed, and then, as heavy firing was heard from Beaumont, General Douay conceived it right to abandon the road to Mouzon and take that to Remilly.