French influence was reinforced during his reign, especially by his marriage to Isabelle, daughter of Philip V of France. In 1328, at the Battle of Cassel, Philip VI entrusted to Guigues the command of the Seventh Corps, with its twelve banners.
During his reign, French culture had a profound impact on him, especially due to his marriage to Isabelle, daughter of Philip V of France. As a result, Guigues was given command of the Seventh Corps at the Battle of Cassel in 1328.