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
Battle of Bannockburn was reopened. After the death of Edward I, his son Edward II of England came to the throne in 1307 but was incapable of providing the determined leadership his father had shown, and the English position soon became more difficult. In 1313, Bruce demanded the allegiance of all remaining Balliol supporters, under threat of losing their lands, as well as the surrender of the English forces encircling Stirling Castle. The castle was one of the most important castles held by the English, as it commanded the route north into the Scottish Highlands. It was besieged in 1314 by Robert the