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 Dupplin Moor isolated in a hostile country he moved his forces south to the old Balliol patrimony in Galloway, the only part of Scotland that showed any kind of support for the new king. In December at Annan he was surprised by a party of Bruce loyalists and chased half-dressed across the English border. Any future attempt to recover his throne would have to be with the open support of the English king. Battle of Dupplin Moor The Battle of Dupplin Moor was fought between supporters of the infant David II, the son of Robert the Bruce, and rebels supporting the Balliol