Les Forces Navales Françaises Libres ("Free French Naval Forces") were the naval arm of the Free French Forces during the Second World War. They were commanded by Admiral Émile Muselier.
In the wake of the Armistice and the Appeal of 18 June, Charles de Gaulle founded the Free French Forces (Forces Françaises Libres, or FFL), including a naval arm, the "Free French Naval Forces" (Les Forces Navales Françaises Libres, or FNFL). On 24 June 1940, de Gaulle made a separate call specifically to servicemen overseas to join him, and two days later the submarine Narval entered Malta and pledged its allegiance to the FFL. On 30 June, De Gaulle was joined by vice-admiral Émile Muselier, who had come from Gibraltar by flying boat. Muselier was the only flag officer of the French Navy to answer the call of De Gaulle.
The French fleet was widely dispersed. Some vessels were in port in France; others had escaped from France to British controlled ports, mainly in Britain itself or Alexandria in Egypt. At the first stage of Operation Catapult, the ships in the British ports of Plymouth and Portsmouth were simply boarded on the night of 3 July 1940. The then-largest submarine in the world, the Surcouf, which had sought refuge in Portsmouth in June 1940 following the German invasion of France, resisted the British operation. In capturing the submarine, two British officers and one French sailor were killed. Other ships were the two obsolete battleships Paris and Courbet, the destroyers Triomphant and the Léopard, eight torpedo boats, five submarines (the Minerve, Junon) and a number of other ships of lesser importance.