The reserve, composed of the men of Argyle, Carrick, Kintyre, and the Isles, formed the fourth line of battle, and was commanded by King Robert I of Scotland in person.
In this reserve were five thousand Highlanders, under twenty-one different chiefs, commanded by Angus Og MacDonald, father of John of Islay, Lord of the Isles.
The following clans, commanded by their chiefs, fought well: Stewart, MacDonald, MacKay, Maclntosh, MacPherson, Cameron, Sinclair, Drummond, Campbell, Menzies, MacLean, Sutherland, Robertson, Grant, Fraser, MacFarlane, Ross, MacGregor, Munro, MacKenzie, and MacQuarrie.
There was the clanging of arms, knights shouting their war-cry, arrows maddening the horses, banners rising and sinking, the ground covered with gore, shreds of pennons, broken armor, and rich scarfs soiled with blood and clay; and amidst the din was heard the groans of the wounded and dying.
To show his appreciation for the great service, he assigned to Angus and his descendants forever the honorable position of the right flank of the royal army.