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 Bruce, 2nd Baron of Clackmannan and killed on 23 July 1403, during the Battle of Shrewsbury, and his son Robert succeeded him as third baron. Robert Bruce, 2nd Baron of Clackmannan Sir Robert Bruce, 2nd Baron of Clackmannan & Rate (died 23 July 1403) was the son of Sir Thomas Bruce 1st Baron of Clackmannan and Marjorie Charteris of Stenhouse. Robert Bruce was born in Clackmannan, Scotland the son of Thomas Bruce, 1st Baron of Clackmannan and his wife Marjory. Robert received more land in Clackmannan in 1359 from his cousin, King David II, and additional land in Rate, Scotland in 1367. He married Isabel