While the states deliberated upon this declaration, count Lowendahl entered Dutch Brabant, and invested the town and fortress of Sluys, the garrison of which surrendered themselves prisoners of war on the nineteenth day of April. This was likewise the fate of Sas-van-Ghent, while the marquis de Contades, with another detachment, reduced the forts Perle and Leifkenshoek, with the town of Philippine, even within hearing of the confederate army. The fort of Sandberg was vigorously defended by two English battalions; but they were overpowered, and obliged to retire to Welsthoorden; and count Lowendahl undertook the siege of Hulst, which was shamefully surrendered by La Roque the Dutch governor, though he knew that a reinforcement of nine battalions was on the march to his relief. Then the French general took possession of Axel and Terneuse, and began to prepare flat-bottomed boats for a descent on the island of Zealand. The Dutch people were now struck with consternation. They saw the enemy at their doors, and owed their immediate preservation to the British squadron stationed at the Swin, under the command of commodore Mitchel,* who, by means of his sloops, tenders, and small craft, took such measures as defeated the intention of Lowendahl. The common people in Zealand being reduced to despair, began to clamour loudly against their governors, as if they had not taken the proper measures for their security. The friends of the prince of Orange did not neglect this opportunity of promoting his interest. They encouraged their discontent, and exaggerated the danger; they reminded them of the year one thousand six hundred and seventy-two, when the French king was at the gates of Amsterdam, and the republic was saved by the choice of a stadtholder; they exhorted them to turn their eyes on the descendant of those heroes who had established the liberty and independence of the United Provinces; they extolled his virtue and ability; his generosity, his justice, his unshaken love to his country. The people in several towns, inflamed by such representations to tumult and sedition, compelled their magistrates to declare the prince of Orange stadtholder. He himself, in a letter to the states of Zealand, offered his services for the defence of the province. On the twenty-eighth day of April he was nominated captain-general and admiral of Zealand. Their example was followed by Rotterdam and the whole province of Holland; and on the second day of May, the prince of Orange was, in the assembly of the states-general, invested with the power and dignity of stadtholder, captain-general, and admiral of the United Provinces. The vigorous consequences of this resolution immediately appeared. All commerce and contracts with the French were prohibited; the peasants were armed and exercised; a resolution passed for making a considerable augmentation of the army, a council of war was established for inquiring into the conduct of the governors who had given up the frontier places; and orders were issued to commence hostilities against the French, both by sea and land.
Meanwhile the duke of Cumberland took post with his whole army between the two Nethes, to cover Bergen-op-Zoom and Maestricht; and Mareschal Saxe called in his detachments with a view to hazard a general engagement. In the latter end of May the French king arrived at Brussels, and his general resolved to undertake the siege of Maestricht. For this purpose he advanced towards Louvain; and the confederates perceiving his drift, began their march to take post between the town and the enemy. On the twentieth day of June they took possession of their ground, and were drawn up in order of battle, with their right at Bilsen, and their left extending to Wirle within a mile of Maestricht, having in the front of their left wing the village of Laffeldt, in which they posted several battalions of British infantry. The French had taken possession of the heights of Herdeeren, immediately above the allies; and both armies cannonaded each other till the evening. In the morning the enemy’s infantry marched down the hill in a prodigious column, and attacked the village of Laffeldt, which was well fortified, and defended with amazing obstinacy. The assailants suffered terribly in their approach from the cannon of the confederates, which was served with surprising dexterity and success; and they met with such a warm reception from the British musquetry as they could not withstand; but, when they were broken and dispersed, fresh brigades succeeded with astonishing perseverance. The confederates were driven out of the village; yet being sustained by three regiments, they measured back their ground, and repulsed the enemy with great slaughter. Nevertheless, count Saxe continued pouring in other battalions, and the French regained and maintained their footing in the village, after it had been three times lost and carried. The action was chiefly confined to this post, where the field exhibited a horrible scene of carnage. At noon the duke of Cumberland ordered the whole left wing to advance against the enemy, whose infantry gave way; prince Waldeck led up the centre; marshal Bathiani made a motion with the right wing towards Herdeeren, and victory seemed ready to declare for the confederates, when the fortune of the day took a sudden turn to their prejudice. Several squadrons of Dutch horse posted in the centre gave way, and flying at full gallop, overthrew five battalions of infantry that were advancing from the body of reserve. The French cavalry charged them with great impetuosity, increasing the confusion that was already produced, and penetrating through the lines of the allied army, which was thus divided about the centre. The duke of Cumberland, who exerted himself with equal courage and activity in attempting to remedy this disorder, was in danger of being taken; and the defeat would in all probability have been total, had not sir John Ligonier taken the resolution of sacrificing himself and a part of the troops to the safety of the army. At the head of three British regiments of dragoons, and some squadrons of imperial horse, he charged the whole line of the French cavalry with such intrepidity and success, that he overthrew all that opposed him, and made such a diversion as enabled the duke of Cumberland to effect an orderly retreat to Maestricht. He himself was taken by a French carabinier, after his horse had been killed; but the regiments he commanded retired with deliberation. The confederates retreated to Maestricht, without having sustained much damage from the pursuit, and even brought off all their artillery, except sixteen pieces of cannon. Their loss did not exceed six thousand men killed and taken; whereas the French general purchased the victory at a much greater expense. The common cause of the confederate powers is said to have suffered from the pride and ignorance of their generals. On the eve of the battle, when the detachment of the count de Clermont appeared on the hill of Herdeeren, marshal Bathiani asked permission of the commander-in-chief to attack them before they should be reinforced, declaring he would answer for the success of the enterprise. No regard was paid to this proposal; but the superior asked in his turn, where the marshal would be in case he should be wanted? He replied, “I shall always be found at the head of my troops,” and retired in disgust. The subsequent disposition has likewise been blamed, inasmuch as not above one half of the army could act, while the enemy exerted their whole force.