A further augmentation was made in the establishment in the spring of 1793, with a view to its being employed in actual warfare against the revolutionary party in France, who had seized the reins of government in that country, and beheaded their sovereign. A French army under General Dumourier, having attacked the frontiers of Holland, a British force was sent to the continent under the command of His Royal Highness the Duke of York, to co-operate with the Austrians, Prussians, and Dutch; and on the 25th of May, four troops of the PRINCE OF WALES' DRAGOON GUARDS embarked at Northfleet for this service. Having landed at Ostend, they advanced to the vicinity of Tournay, and formed part of a corps of reserve to the covering army during the siege of _Valenciennes_, which place surrendered to His Royal Highness the Duke of York on the 26th of July. The siege of _Dunkirk_ was next undertaken, with the view of replacing that fortress under the dominion of England, and the THIRD DRAGOON GUARDS formed part of the force employed in covering the operation. The enemy having brought forward an immense body of troops, attacked the covering army with great fury; when some severe fighting occurred, during which the THIRD DRAGOON GUARDS, owing to the nature of the ground, had to dismount and act as infantry; and the covering army, being eventually driven from its ground by the superior numbers of the enemy, the Duke of York raised the siege. The British troops afterwards returning to the vicinity of Tournay, were engaged in several skirmishes with the enemy; and towards the end of the year the THIRD DRAGOON GUARDS proceeded to Ghent and Bruges for winter quarters. [Sidenote: 1794] Early in 1794 the regiment was again in the field; and it was engaged in the general attack on the enemy's positions at _Vaux_, _Premont_, _Marets_, and _Catillon_, on the 17th of April; and was subsequently encamped, with nearly the whole of the British army, on the heights of _Cateau_, to cover the siege of _Landrécies_, which was undertaken by the Austrians.