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 campaign into Scotland. Though he captured the castles of Bothwell and Turnberry, he did little to damage the Scots' fighting ability, and in January 1302 he agreed to a nine-month truce. It was around this time that Robert the Bruce submitted to Edward, along with other nobles, even though he had been on the side of the Scots until then. There were rumours that John Balliol would return to regain the Scottish throne. Soules, who had probably been appointed by John, supported his return, as did most other nobles. But it was no more than a rumour and nothing came