Raoul de Caours was a Breton knight who served both the English and French during the Hundred Years' War.

Raoul appears to have originally sided with the Montfortist cause in the War of the Breton Succession and was in the service of Jean de Montfort.

Remission was granted in forgiveness for "rebellions of which he was guilty and for the excesses he had committed in the wars in Brittany" "tam in partibus Britannie, quam Pictavie et alibi" Raoul then opposed Jean de Montfort.

[3] During an ambush set by Raoul in August 1350 at Auray, he defeated and killed Sir Thomas Dagworth, the English commander in Brittany.

[4] On January 4, 1351, he undertakes by contract to retake for the French King, the towns of Vannes, Quimper and Guérande, as well as other strongholds.