[1] He became an official interpreter to the General Headquarters of the Royal Flying Corps (RFC), based at Saint-Omer from August 1914 to November 1915.

One of his British colleagues at St-Omer was Maurice Baring, a lieutenant in the RFC, assistant to General David Henderson and later Hugh Trenchard.

Murat is frequently mentioned in Baring's memoirs..[2] He subsequently commanded the Fort des Sartelles [fr][3] during the Battle of Verdun in 1916, where his conduct earned him the Croix de Guerre with three citations.

[1] During the session of 22 January 1920 he raised the matter of Léon Accambray [fr], whose espionage for the Germans during World War I was only fully discovered in the 1960s.

[1] Although he was defeated in the 1924 elections and lost his seat, he continued to support the Appel au peuple parliamentary group as the representative of Napoléon in the Bonapartiste movement.