Upon the French side the plan was purely defensive, as their inferior numbers and their reliance upon earthworks both necessitated and proved. It was Villars' plan to hold every part of his line with a force proportionate to its strength; to furnish the woods a little more heavily than the entrenchments of the open gap, but everywhere to rely upon the steadiness of his infantry and their artificial protections in the repelling of the assault. His cavalry he drew up behind this long line of infantry defence, prepared, as has already been said, to charge through gaps whenever such action on their part might seem effective.
It will be perceived that the plan upon either side was of a very simple sort, and one easily grasped. On the side of the allies it was little more than a "hammer-and-tongs" assault upon a difficult and well-guarded position; on the side of the French, little more than a defence of the same.
Next must be described the nature of the troops engaged in the various parts of the field.
On their left--that is, to the south of their lines and over against the wood of Lanière--one-third of the army under the Prince of Orange. The bulk of this body consisted in Dutch troops, of whom thirty-one battalions of infantry were present, and behind the infantry thus drawn up under the Dutch commander were his cavalry, instructed to keep out of range during the attack of the infantry upon the wood, and to charge and complete it when it should be successful. Embodied among these troops the British reader should note a corps of Highlanders, known as the Scottish Brigade.[12] These did not form part of the British army, but were specially enrolled in the Dutch service. The cavalry of this left wing was under the command of the Prince of Hesse-Cassel, who was mentioned a few pages back in the advance upon Mons. It numbered somewhat over 10,000 sabres.
The other end of the allied position consisted in two great forces of infantry acting separately, and in the following fashion:--
First, a force under Schulemberg, which attacked the salient angle of the forest of Sars on its northern face, and another body attacking the other side of the same angle, to wit, its eastern face. In the first of these great masses, that under Schulemberg, there were no English troops. In strength it amounted alone to nearly 20,000 men. The second part, which was to attack the eastern face, was commanded by Lottum, and was only about half as strong, contained a certain small proportion of English.