Clan Sinclair to St Briavels Castle, and in 1296 he swore fealty to Edward I of England. In 1303 the Battle of Roslin took place where Scots under Henry Sinclair of Rosslyn and the Clan Comyn defeated an English force. The Battle of Loudoun Hill took place in 1307 where Scots under Robert the Bruce, assisted by Henry Sinclair of Rosslyn again defeated the English. The family initially favoured John Balliol's claim to the throne but later it became paramount that they gave their loyalty to Robert the Bruce. The Battle of Bannockburn was fought in 1314, where the Clan Sinclair fought
Robert the Bruce Aberdeen and Buchan were destroyed and their inhabitants killed. Bruce ordered similar harryings in Argyle and Kintyre, in the territories of Clan MacDougall. With these acts, Bruce had successfully destroyed the power of the Comyns, which had controlled much of northern and southwestern Scotland for over 150 years. He then crossed to Argyll and defeated the MacDougalls (allies of the Comyns) at the Battle of Pass of Brander and took Dunstaffnage Castle, the last major stronghold of the Comyns. In March 1309, Bruce held his first parliament at St. Andrews and by August he controlled all of Scotland north of