The ROYALS again took the field towards the end of April, 1711, and, advancing up the country, joined the army near Douay, and were reviewed with the remainder of the British infantry, on the 8th of June, by the Duke of Marlborough, at the camp at Warde. On the 14th the army advanced to the plains of Lens. The enemy had thrown up a new line of entrenchments; and the French army, commanded by Marshal Villars, was posted behind these formidable works, which were deemed impregnable. But the British commander, by menacing the enemy's left, occasioned the French troops to be drawn to that quarter; then, by a forced march, passed the lines at an unguarded part at _Arleux_, and afterwards invested _Bouchain_, a fortified town of Hainault, situated on both sides of the river Scheldt. The ROYALS formed part of a division of twenty battalions, commanded by Lieut.-General the Earl of Orkney, which took post on the north and north-west side of the town and river. The French, by a night march, gained possession of the heights of Wavrechin, from whence they expected to be able to relieve the town; and the ROYALS formed part of a division of infantry which advanced to dislodge the enemy; but the position was found too formidable to be attacked, and the regiment retired without firing a shot. During the night a series of works was constructed; a causeway was also made through the deep inundations which the enemy had, by means of sluices on the river, caused to overflow the low grounds near the town; and thus Bouchain was completely invested, and all communication with the troops on the heights of Wavrechin cut off. The siege was then prosecuted with vigour, and the ROYALS took their turn of duty in the trenches, and in carrying on the attacks, and had several men killed and wounded. The total loss of the British troops in this siege was 1,154 officers and men killed and wounded. The garrison agreed to surrender on the 13th of September. The ROYALS remained at Bouchain until the works were repaired, and afterwards went into quarters for the winter. [Sidenote: 1712] In the early part of April, 1712, the regiment once more took the field, and on the 19th of that month pitched its tents near Tournay, where the Duke of Ormond arrived on the 9th of May, and took command of the army, the Duke of Marlborough having, for a political cause, been removed from his military appointments. On the 19th of May the army advanced, and on the 21st encamped on the hills of St. Denis, near Bouchain; thence proceeding across the Scheldt, arrived a few days afterwards near the frontiers of France; and the two grenadier companies of the ROYAL Regiment, forming part of a reconnoitring party, advanced a few miles into Picardy.