During the campaign of 1707, the services of the regiment were limited to marches and occupying positions; and it passed the winter in West Flanders. The Union of Scotland and England took place this year, which occasioned St. George's cross to be added to the colours of the Scots regiments, and St. Andrew's cross to the colours of the English regiments. The corps, previously designated _Scots_ regiments, took the title of _North British_ regiments. [Sidenote: 1708] In May, 1708, the regiment again took the field, and on the 11th of July it had an opportunity of acquiring fresh laurels at the battle of _Oudenarde_, which was fought in the broken grounds near the river Scheldt. On this occasion the regiment was engaged in a severe musketry action, and it succeeded in driving the French corps opposed to it from field to field, until the darkness of the night put an end to the conflict. Before the following morning the wreck of the French army had retreated in disorder towards Ghent. After this victory, the siege of _Lisle_, the capital of French Flanders, was resolved upon. This fortress was deemed almost impregnable; it was garrisoned by fifteen thousand men, commanded by Marshal Boufflers, who resolved upon making a desperate defence. The NORTH BRITISH FUSILIERS were selected to take part in the attack of this important fortress, under the orders of Prince Eugene of Savoy; the covering army was commanded by the Duke of Marlborough. The regiment had several men killed and wounded in carrying on the approaches, and at the attack of the counterscarp it had thirteen men killed; three officers, four serjeants, and sixty-six rank and file wounded. The progress of this siege was a subject of peculiar interest throughout Europe; and the besieging army witnessed its extraordinary efforts for the capture of the place, attended by complete success, on the 9th of December, when the citadel surrendered. [Sidenote: 1709] Having reposed a few months in quarters, and received a body of fine recruits from Scotland, the regiment joined the army, and was employed in covering the siege of _Tournay_, in July and August, 1709. The citadel of Tournay surrendered in the beginning of September, and the army afterwards marched in the direction of Mons.