Between 1939 and 1945 the Royal Navy's Fleet Air Arm grew from a small force into a powerful strategic weapon. British carrier-based aircraft fought throughout the world and David Brown here describes their activities in the Home, Mediterranean, Eastern and British Pacific Fleets, together with Forces created for specific operations, listing aircraft and units embarked during the various phases. He goes on to describe carrier operations in the Pacific between 1941 and 1945, the greatest maritime war in history. Both the United States and Imperial Japanese Navies watched the Royal Navy's early carrier operations in the European Theatre and benefited from the lessons. American aircrews and sailors learnt quickly in action until, by March 1945, the United States Fifth Fleet with its associated Marine Corps formations was probably the most efficient and effective instrument of war deployed in the pre-nuclear age. This new work contains material from two volumes, first published in 1968 and 1974, merged with notes for a third which David Brown prepared but never published before his death. They appear for the first time together, providing the most detailed single-volume account currently available of the operation of British, American and Japanese aircraft carriers in World War II.