In that country he had no longer the same formidable enemy with whom to contend. Luxemburg was dead, and his place was ill supplied by Villeroy and Louis' illegitimate son, the Duke of Maine, who was sent to learn the art of war under him. As Flanders was expected to be the great seat of war, the bulk of the French army was placed under Villeroy in that country. Boufflers, with 12,000 men, guarded the Sambre. William, however, had set his heart upon regaining Namur. Judicious feints deceived Villeroy as to his intentions, and suddenly his own army, that of the Brandenburgers and that of the Elector of Bavaria, marched straight against the city. Boufflers had just time to throw himself with his troops into the town. A body of troops under the Prince of Vaudemont had been left to watch Villeroy in Flanders. When that general advanced, the Prince could not hold his isolated position, and only succeeded in making good his retreat through the cowardice of the Duke of Maine. Villeroy advanced almost unopposed. He took the towns of Dixmuyde and Deynse, the garrisons of which, contrary to the terms of capitulation, were sent prisoners to France; and hoping by threatening the capital to draw William from Namur, he approached and ruthlessly and uselessly bombarded Brussels. But, undisturbed by Villeroy's manœuvres, William energetically pursued the siege. He was assisted by Cohorn, who had originally fortified the town, and had seen it taken by the skill of his great rival Vauban. Vauban had since much increased the fortifications, and Cohorn was eager to regain his honour by capturing it. At length, after some fierce assaults, in which the English under Lord Cutts, who for his bravery under fire got the nickname of "the Salamander," had greatly distinguished themselves, the town surrendered, but the castle still held out. It became evident to Villeroy that the actual presence of his army could alone raise the siege. Drawing troops from all the neighbouring garrisons, he approached with 80,000 men. But William now felt himself strong enough to give him battle without withdrawing from his operations. For three days the armies remained in presence, and William lay expecting the attack, but Villeroy judged his position too strong to be taken, and withdrew. The fate of the fortress was now sealed, but Boufflers thought that his honour demanded that he should stand an assault; nor was it till the English had succeeded at the cost of 2000 men in making a lodgment in the place that he consented to treat, and for the first time in history a French marshal surrendered a fortress to a victorious enemy. Having gone through the ceremony of surrender, Boufflers was much surprised and enraged at being arrested on his road to France. His angry exclamations against the breach of the terms of capitulation were met by the reply, that William was only following the example of Louis with regard to the garrisons of Dixmuyde and Deynse.