The allied army having moved their camp from Saxenhansen to the village of Kalle near Cassel, remained in that situation till the thirtieth day of July, when the troops were again put in motion. The chevalier de Muy, having passed the Dymel at Stradtbergen, with the reserve of the French army, amounting to thirty-five thousand men, extended this body down the banks of the river, in order to cut off the communication of the allies with Westphalia; while the duke de Broglio marched up with his main wing to their camp at Kalle, and prince Xavier of Saxony, who commanded their reserve on the left, advanced towards Cassel; prince Ferdinand, leaving general Kielmansegge with a body of troops for the defence of the city, decamped in the night of the thirtieth, and passed the Dymel without loss between Gibenau and Dringleberg. The hereditary prince, who had the preceding day passed the same river, in order to reinforce general Sporcken, who was posted near Corbeke, now reconnoitred the position of the enemy, and found them possessed of a very advantageous camp between Warbourg and Ochsendorff. Prince Ferdinand having resolved to attack them, ordered the hereditary prince and general Sporcken to turn their left, while he himself advanced against their front, with the main body of the army.. The enemy was accordingly attacked almost at the same instant, both in flank and in rear, with equal impetuosity and success. As the infantry of the allied army could not march fast enough to charge at the same time, the marquis of Granby was ordered to advance with the cavalry of the right; and the brigade of English artillery, commanded by captain Phillips, made such expedition, that they were up in time to second the attack in a most surprising manner. The French cavalry, though very numerous, retired at the approach of the marquis, except three squadrons, who stood the charge and were immediately broken. Then the English horse fell upon the enemy’s infantry, which suffered greatly, while the town of Warbourg was assaulted by the Britannic legion. The French, finding themselves hard pressed on both flanks, as well in front as in rear, retired precipitately, with considerable damage, occasioned chiefly by the British cannon and dragoons, and many were drowned in attempting to ford the Dymel. The battalion of Maxwell, and a brigade under colonel Beckwith, composed of grenadiers and highlanders, distinguished themselves remarkably on this occasion. The enemy left about fifteen hundred men killed or wounded on the field of battle; with some colours, and ten pieces of cannon; and about the same number were made prisoners. Monsieur de Muy lay all night under arms, on the heights of Volk-Missen, from whence he next day retired towards Wolfshagen. On the evening of the battle, the marquis of Granby received orders to pass the river in pursuit of them, with twelve British battalions and ten squadrons, and encamped at Wilda, about four miles from Warbourg, the heights of which were possessed by the enemy’s grand army. 561 [See note 4 O, at the end of this Vol.] By this success, prince Ferdinand was enabled to maintain his communication with Westphalia, and keep the enemy at a distance from the heart of Hanover; but to these objects he sacrificed the country of Cassel: for prince Xavier of Saxony, at the head of a detached body, much more numerous than that which was left under general Kielmansegge, advanced towards Cassel, and made himself master of that city; then he reduced Munden, Gottengen, and Eimbeck in the electorate of Hanover. All that prince Ferdinand could do, considering how much he was out-numbered by the French, was to secure posts and passes, with a view to retard their progress, and employ detachments to harass and surprise their advanced parties. In a few days after the action at Warbourg, general Luckner repulsed a French detachment which had advanced as far as Eimbeck, and surprised another at Nordheim. At the same period, colonel Donap, with a body of the allied army, attacked a French corps of two thousand men, posted in the wood of Sababourg, to preserve the communication between their grand army and their troops on the other side of the Weser; and, notwithstanding the strength of their situation, drove them from their posts, with the loss of five hundred men, either killed or made prisoners; but this advantage was overbalanced by the reduction of Ziegenheim, garrisoned by seven hundred men of the allied army, who, after a vigorous resistance, were obliged to surrender themselves prisoners of war.
On the fifth day of August, prince Ferdinand, being encamped at Buhne, received intelligence that a considerable body of the enemy, amounting to upwards of twenty thousand men, were in motion to make a general forage in the neighbourhood of Geismar. He passed the Dymel early in the morning, with a body of troops and some artillery, and posted them in such an advantageous manner, as to render the enemy’s attempt totally ineffectual, although the foragers were covered with great part of their army. On the same morning, the hereditary prince set out on an expedition to beat up the quarters of a French detachment. Being informed that the volunteers of Clermont and Dauphiné, to the number of one thousand, horse and foot, were cantoned at Zierenberg, at a small distance from the French camp at Dierenberg, and passed their time in the most careless security, he advanced towards them from his camp at Warbourg, within a league of their cantonment, without seeing any of their posts, or meeting with any of their patrols, a circumstance that encouraged him to beat up their quarters by surprise; for this service he pitched upon five battalions, with a detachment of Highlanders, and eight regiments of dragoons. Leaving their tents standing, they began their march at eight in the evening, and passed the Dymel near Warbourg. About a league on the other side of the Dymel, at the village of Witzen, they were joined by the light troops under major Bulow; and now the disposition was made both for entering the town, and securing a retreat in case of being repulsed. When they were within two miles of Zierenberg, and in sight of the fires of the enemy’s grand guard, the grenadiers of Maxwell, the regiment of Kinsley, and the Highlanders, advanced by three separate roads, and marched in profound silence: at length the noise of their feet alarmed the French, who began to fire, when the grenadiers proceeded at a round pace with unloaded firelocks, pushed the piquets, slew the guard at the gate, and rushing into the town, drove everything before them with incredible impetuosity. The attack was so sudden, and the surprise so great, that the French had not time to assemble in any considerable number; but they began to fire from the windows; and in so doing, exasperated the allied troops, who, bursting into the houses, slaughtered them without mercy. Having remained in the place from two to three in the morning, they retreated with about four hundred prisoners, including forty officers, and brought off two pieces of artillery. This nocturnal adventure, in which the British troops displayed equal courage and activity, was achieved with very little loss; but after all, it deserves no other appellation than that of a partisan exploit; for it was attended with no sort of advantage to the allied army.
Considering the superiority of the French army, we cannot account for the little progress made by the duke de Broglio, who, according to our conception, might either have given battle to the allies with the utmost probability of success, or penetrated into the heart of Hanover, the conquest of which seemed to be the principal object of the French ministry. Instead of striking an important stroke, he retired from Immenhausen towards Cassel, where he fortified his camp as if he had thought himself in danger of being attacked; and the war was carried on by small detachments. Major Bulow, being sent with a strong party from the camp of the allied army at Buline, surprised the town of Marburg, destroyed the French ovens, and brought off a considerable quantity of stores and baggage, with some prisoners. He met with the same success at Butzback, where he surprised and took two companies belonging to the regiment of Baugrave, and retired with this body to Franckenberg, where he joined colonel Forsen. On the twelfth day of September they made a movement towards Franckenau; and M. de Stainville, who was posted with a body of French troops at Merdenhagen, advanced to check their progress. He came up with their rear in the neighbourhood of Munden, and attacked them in passing the river Orck with such vigour, that Forsen, with some of his cavalry, was taken, and Bulow obliged to abandon some pieces of cannon. The action was just determined, when this last was reinforced by the hereditary prince of Brunswick, who had made a forced march of five German miles, which had fatigued the troops to such a degree, that he deferred his attack till next morning; but, in the meantime, M. de Stainville retired towards Franckenberg. The Hanoverian general Wangenheim, at the head of four battalions and six squadrons, had driven the enemy from the defiles of Soheite, and encamped at Lawenthagen; but, being attacked by a superior number, he was obliged in his turn to give way, and his retreat was not effected without the loss of two hundred men, and some pieces of artillery. When the enemy retired, general Wangenheim repassed the Weser, and occupied his former situation at Ussar. Meanwhile, general Luckner gained an advantage over a detachment of French cavalry near Norten. Prince Ferdinand, when mareschal Broglio quitted his camp at Immenhausen, made a motion of his troops, and established his head-quarters at Geismer-wells, the residence of the landgrave of Hesse-Cassel; from thence, however, he transferred them, about the latter end of September, to Ovilgune, on the Westphalian side of the Dymel.