During the onset of the Hundred Years' War, Nicolas Béhuchet de Musy was appointed as the commanding officer of the French squadrons, serving as the "captain general of the sea army".

Utilising his navy, he carried out multiple raids on the English coastline due to the ongoing Franco-English dispute over the French Crown's succession.

The king of England at the time, Edward III, who was the grandson of Philip the Fair, was removed from the line of succession to the French throne in 1328.

In response, Edward launched a military campaign to claim the French Crown, thus sparking a new conflict between France and England.

In contrast, unlike its neighbour, the island of Guernsey was conquered and occupied by French troops who landed under the command of Béhuchet de Musy.

In 1340, Béhuchet was chosen by the King, along with Quieret, to lead the French fleet and prevent Edward III's army from landing near L'Écluse.

However, on 24 June, the English fleet wiped out the French ships, resulting in numerous sailors drowning as they were unable to flee.