The vigilance which was thus exercised along both the Anglo-allied and Prussian line of outposts, obtained for Wellington and Blücher the fullest extent of information which they could reasonably have calculated on receiving respecting the dispositions of Napoleon immediately prior to an attack.

Blücher and Wellington were aware that considerable masses of French troops had moved by their right, and assembled in front of Charleroi.
While they were aware that French troops beyond Tournai, Mons, and Binche had moved, this could have been intended to draw the Anglo-allied army towards Charleroi.
If so the French would launch a feigned attack on it, while the real attack would be by Mons.

Wellington made no changes to the disposition of his forces, but Blücher immediately ordered his army to concentrate at Sombreffe (a village on the Nivelles-Namur road at the junction of a road that ran to Charleroi).
They would then be able to advance through Charleroi should that be the real line of attack, but also be astride a road that would allow them to move rapidly to support Wellington, should that attack be made by the Mons road.
The vigilance which was thus exercised along both the Anglo-allied and Prussian line of outposts, obtained for Wellington and Blücher the fullest extent of information which they could reasonably have calculated on receiving respecting the dispositions of Napoleon immediately prior to an attack.
Blücher and Wellington were aware that considerable masses of French troops had moved by their right, and assembled in front of Charleroi. While they were aware that French troops beyond Tournai, Mons, and Binche had moved, this could have been intended to draw the Anglo-allied army towards Charleroi. If so the French would launch a feigned attack on it, while the real attack would be by Mons.
Wellington made no changes to the disposition of his forces, but Blücher immediately ordered his army to concentrate at Sombreffe (a village on the Nivelles-Namur road at the junction of a road that ran to Charleroi). They would then be able to advance through Charleroi should that be the real line of attack, but also be astride a road that would allow them to move rapidly to support Wellington, should that attack be made by the Mons road.
Waterloo campaign: start of hostilities