Though the French king could not prevent the elevation of the grand duke to the Imperial throne, he resolved to humble the house of Austria, by making a conquest of the Netherlands. A prodigious army was there assembled, under the auspices of mareschal count de Saxe; and his most christian majesty, with the dauphin, arriving in the camp, they invested the strong town of Tournay on the thirtieth day of April. The Dutch garrison consisted of eight thousand men, commanded by the old baron Dorth, who made a vigorous defence. The duke of Cumberland assumed the chief command of the allied army, assembled at Soignes; he was assisted with the advice of the count Konigsegg, an Austrian general, and the prince of Waldeck, commander of the Dutch forces. Their army was greatly inferior in number to that of the enemy; nevertheless, they resolved to march to the relief of Tournay. They accordingly advanced to Leuse; and on the twenty-eight day of April took post at Maulbre, in sight of the French army, which was encamped on an eminence from the village of Antonie, to a large wood beyond Vezon, having Fontenoy in their front. Next day was employed by the allies in driving the enemy from some outposts, and clearing the defiles through which they were obliged to advance to the attack; while the French completed their batteries, and made the most formidable preparations for their reception. On the thirtieth day of April, the duke of Cumberland, having made the proper dispositions, began his march to the enemy at two o’clock in the morning; a brisk cannonade ensued; and about nine both armies were engaged. The British infantry drove the French beyond their lines; but the left wing failing in the attack on the village of Fontenoy, and the cavalry forbearing to advance on the flanks, they measured back their ground with some disorder, from the prodigious fire of the French batteries. They rallied, however, and returning to the charge with redoubled ardour, repulsed the enemy to their camp with great slaughter; but, being wholly unsupported by the other wing, and exposed both in front and flank to a dreadful fire, which did great execution, the duke was obliged to make the necessary dispositions for a retreat about three o’clock in the afternoon, and this was effected in tolerable order. The battle was fought with great obstinacy, and the carnage on both sides was very considerable. The allies lost about twelve thousand men, including a good number of officers; among these were lieutenant-general Campbell, and major-general Ponsonby. The victory cost the French almost an equal number of lives; and no honour was lost by the vanquished. Had the allies given battle on the preceding day, before the enemy had taken their measures and received all their reinforcements, they might have succeeded in their endeavour to relieve Tournay. Although the attack was generally judged rash and precipitate, the British and Hanoverian troops fought with such intrepidity and perseverance, that if they had been properly sustained by the Dutch forces, and their flanks covered by the cavalry, the French in all likelihood would have been obliged to abandon their enterprise. The duke of Cumberland left his sick and wounded to the humanity of the victors; and retiring to Aeth, encamped in an advantageous situation at Lessines. The garrison of Tournay, though now deprived of all hope of succour, maintained the place to the twenty-first day of June, when the governor obtained an honourable capitulation. After the conquest of this frontier, which was dismantled, the duke of Cumberland, apprehending the enemy had a design upon Ghent, sent a detachment of four thousand men to reinforce the garrison of that city; but they fell into an ambuscade at Pas-du-mêle, and were killed or taken, except a few dragoons that escaped to Ostend; on that very night, which was the twelfth of June, Ghent was surprised by a detachment of the French army. Then they invested Ostend, which, though defended by an English garrison, and open to the sea, was, after a short siege, surrendered by capitulation on the fourteenth day of August Dendermonde, Oudenarde, Newport, and Aeth, underwent the same fate; while the allied army lay entranced beyond the canal of Antwerp. The French king having subdued the greatest part of the Austrian Netherlands, returned to Paris, which he entered in triumph.