Leaving its winter-quarters in the middle of April, 1710, the regiment directed its march to the vicinity of Tournay, where the allied army assembled. The capture of the small post of _Mortagne_ proved a prelude to another campaign in which several fortresses were wrested from the French monarch. By a forced march the enemy's lines were passed at _Pont-à-Vendin_, and the siege of _Douay_, a considerable fortress in the second line of defence which covered the frontiers of Artois, was undertaken. Douay is a town of antiquity, having been a place of note in the time of the first Counts of Flanders; the river Scarpe running through the town, the river Haine being near it, the works being also strong, numerous, and well garrisoned, the siege of this place was an important undertaking. The TENTH foot, commanded by Lieut.-Colonel Henry Grove, had their post in the lines of circumvallation, but did not take part in the attacks upon the works. When the French army, under Marshal Villars, advanced to raise the siege, the regiment was in position to oppose the enemy, and it had several men killed and wounded by a heavy cannonade which occurred on that occasion. Marshal Villars did not hazard an engagement, and the governor of Douay, after a very gallant defence, surrendered on the 27th of June. After this conquest the English general resolved to attack _Bethune_, a strong town formerly belonging to the Counts of Flanders; but having been taken by Gaston, Duke of Orleans, it was annexed to the French monarchy at the peace of the Pyrenees in 1659. During the siege of Bethune, the TENTH had their post in the covering army encamped at Villars-Brulin, where the regiment was stationed until the garrison surrendered on the 29th of August. The next undertaking in which the army was engaged was the siege of _Aire_ and _St. Venant_, which towns were so situated as to admit of a simultaneous investment, and as the capture of these fortresses would secure the navigation of the Lys, and open a water communication with Tournay, Lisle, and Ghent, the skill of the generals and the valour of the troops were called forth to insure their reduction. The TENTH were among the corps engaged in the siege of Aire, and as the governor of that place made a very vigorous defence, a severe loss was sustained in killed and wounded. The regiment was several times warmly engaged in carrying on the attacks and storming the out-works; on which occasions its gallant bearing called forth the commendations of the Prince of Anhalt, who commanded the troops employed in the siege. On the 9th of November, the garrison surrendered; but the possession of Aire was purchased at a serious loss of brave soldiers.