protect the landing force. The failure at Gallipoli came because the Turks could easily reinforce the specific landing sites. The Japanese would be unable to land new forces on the islands under attack. Not knowing which of the many islands would be the American target, the Japanese would have to disperse their strength by garrisoning many islands that would never be attacked. An island like Eniwetok in the Marshall Islands, would, Ellis estimated, require two regiments, or 4,000 Marines. Guided by Marine observer aircraft, and supplemented by Marine light bombers, warships would provide enough firepower so that Marines would not need any heavy artillery (in contrast to the Army, which relied heavily on its artillery). Shelling defended islands was a new mission for warships. The Ellis model was officially endorsed in 1927 by the Joint Board of the Army and Navy (a forerunner of the Joint Chiefs of Staff). However, actual implementation of the new mission took another decade because the Marine Corps was preoccupied in Central America and the Navy was slow to start training in how to support the landings. The prototype advanced base force officially evolved into the Fleet Marine Force (FMF) in 1933. In 1939, during the annual Fleet Landing Exercises, the FMF became interested in the military potential of Andrew Higgins's design of a powered, shallow-draught boat. These LCVPs, dubbed the 'Higgins Boats', were reviewed and passed by the U.S. Naval Bureau of Construction and Repair. Soon, the Higgins boats were developed to a final design with a ramp, and were produced in large numbers. Second World War By the Second World War tactics and equipment had moved on. The first use of British landing craft in an opposed landing in the Second World War, saw the disembarkation of French Foreign Legionnaires of the 13th Demi-Brigade and supporting French Hotchkiss H39 tanks on the beach at Bjerkvik, eight miles (13 km) above Narvik, on 13 May during the Norwegian campaign. The first major and successful amphibious operation was Operation Ironclad, a British campaign to capture Vichy French-controlled Madagascar. The naval contingent consisted of over 50 vessels, drawn from Force H, the British Home Fleet and the British Eastern Fleet, commanded by Rear Admiral Edward Neville Syfret. The fleet included the aircraft carrier Illustrious, her sister ship Indomitable and the aging battleship Ramillies to cover the landings. The first wave of the British 29th Infantry Brigade