With his colleagues Bourmont, Courvoisier and Guernon Ranville, he contributed to revoke the treaty first signed with the envoys of the Pasha of Egypt, Muhammad Ali, whereby the latter was responsible for waging war against the pirates in Africa and avenging the blow given by the Dey of Algiers to the consul of France.
The château de Guernon-Ranville is located in Le Bas de Ranville in the village of Ranville, in the Calvados region Calvados of Lower Normandy in France.