At three o’clock on the morning of the 18th, while Coburg was signing the orders for his troops, the French army began its march to the attack. On the south Osten’s division was left about Flers and Lezennes, to watch the Archduke Charles and Kinsky; while Bonnaud, dividing his eighteen thousand men into two columns, directed them northward, the one by L’Hempenpont upon Lannoy, the other by Pont-à-Breug upon Roubaix. Simultaneously Malbrancq’s brigade marched south from Roncq upon Mouveaux; Macdonald’s from Mount Halluin upon the western front of Turcoing; Compère’s from Mouscron upon the northern front; Thierry’s, also from Mouscron, together with Daendels’s from Aelbeke, upon Wattrelos; while Jardon’s brigade moved from Belleghem towards Dottignies to hold the Hanoverians in check. Excluding this last brigade, sixty thousand men in all were thus turned upon the six posts in which the eighteen thousand men under Otto and the Duke of York were dispersed. Otto’s force, being nearer to the enemy, was the first to feel the weight of the attack. General Montfrault, who commanded at Tourcoing, perceiving the overwhelming strength of the enemy, begged reinforcements from the Duke of York, who sent him two Austrian battalions from Roubaix, but with strict orders that they should return in the event of their arriving too late to save the town. As a matter of fact they did arrive too late, for the garrison had already been driven from Tourcoing; but none the less they attached themselves, as was perhaps natural, to Montfrault, who stood fast on the eastern skirts of the town and held back the enemy for a time, until a French battery unlimbering on ground to the north of him, forced him to retire. Seeing himself threatened by large bodies of cavalry, Montfrault formed his troops into a large square, with four battalions and light artillery in front, one battalion on each flank, and the cavalry in the rear. In this order he fell back, his heavy artillery and waggons being enclosed in the centre of the square, and his light troops skirmishing on all four sides. It was about half-past eight when he began his retrograde movement; but already Wattrelos, the first post on his rear, was in possession of the enemy. The garrison, two Hessian battalions, had manfully resisted an attack of six times their number until eight o’clock, when, finding themselves in danger of being surrounded, they retired, and, with the help of two companies sent forward by General Otto, withdrew successfully to Leers. Montfrault thereupon found himself compelled to leave the main road for a by-way, which ran between Wattrelos and Roubaix, in order to continue his retreat.