First raised 1678 as The Earl of Mars Regiment of Foot to fight against the Covenanters. 1679: Battle of Bothwell Bridge. [More detail at Kronoskaf WSS page.]
The colours depicted here are recorded in 1685 but may have been carried for much longer. In the absence of definite information they can be carried by units in the War of the Spanish Succession. (Robert Hall shows them in his plate for the regiment at Ramillies, for instance.)
1685 Renamed Scots Fusiliers Regiment of Foot. and helped crush Argyle's Rebellion in Scotland.
Further Service:
1689 Nine Years' War: Battle of Walcourt
1692 Battle of Steenkerque
1693 Battle of Landen
1695 Regiment captured at Deinse
1697 Returned to Scotland
Two colonels of the regiment were killed in action: Colonel Archibald Row killed Blenheim 1704 and Colonel Sampson de Lalo killed Malplaquet 1709.
Service WSS:
1703 Sieges of Huy and Limbourg
1704 Combat of Schellenberg; siege of Ingolstadt; battle of Blenheim with heavy casualties
1705 Expedition up the Moselle; forcing of the French Lines at Helixem and Neer Hespen
1706 Battle of Ramillies; capture of Ostend, Menin and Ath
1707 With the union of Scotland and England flags changed and the regiment became the North British Fusiliers
1708 Battle of Oudenarde; siege of Lille with fairly heavy casualties
1709 Siege of Tournai; battle of Malplaquet; siege of Mons
1710 Passage of the French Lines at Pont a Vendin; siege of Douai; sieges of Saint Venant and Aire
1711 Passage of French Lines at Arleux; siege of Bouchain
1713 Renamed North British Fusilier Regiment of Foot and became Royal around the same time
And the uniform in the WSS was probably like this (after plate by Robert Hall):
