An ambitious and daring adventurer, Beaumont was a French-born knight in Edward’s army. He was an experienced campaigner who fought in every major engagement against the Scots, including the battle of Falkirk. His marriage to Alice Comyn brought him a claim to lands in Scotland, but he could not claim them so long as Bruce was king.
Beaumont fought with Clifford’s cavalry at Bannockburn. On 23 June, as they advanced towards Stirling Castle, they encountered Randolph’s schiltron by the village of St Ninian’s. Beaumont and his men charged the Scots, but this proved disastrous. The cavalry were unable to break up the tightly-formed schiltron, several of them were captured and the rest were driven back in bloody confusion.
The following day, Beaumont accompanied the king on his desperate flight from the scene of defeat.
Frustrated over his continued inability to claim his lands in Scotland, he became more determined than ever to force Bruce from the throne and continued to fight against the Scots for the rest of his life. He fiercely opposed the peace deal that was reached in 1328, helped to lead a private invasion of Scotland in 1332, and enthusiastically supported the resumption of war between England and Scotland in 1333.
He briefly got to enjoy his lands in Scotland for short periods in the 1330s, but on his death in 1340 his claims died with him.