page_title: History of the aircraft carrier
section_title: World War II
hierarchical_section_title: History of the aircraft carrier / World War II
caption_attribution_description: IWM caption&#160;: An aerial view of HMS Victorious at sea. Steam can be seen venting from the catapult towards the front of the flight deck.
context_page_description: Aircraft carriers are warships that evolved from balloon-carrying wooden vessels into nuclear-powered vessels carrying scores of fixed- and rotary-wing aircraft. Since their introduction they have allowed naval forces to project air power great distances without having to depend on local bases for staging aircraft operations.
  Balloon carriers were the first ships to deploy manned aircraft, used during the 19th and early 20th century, mainly for observation purposes. The advent of fixed-wing aircraft in 1903 was followed in 1910 by the first flight from the deck of a US Navy cruiser. Seaplanes and seaplane tender support ships, such as HMS Engadine, followed. The development of flat top vessels produced the first large fleet ships. This evolution was well underway by the early to mid-1920s, resulting in the commissioning of ships such as Hōshō, HMS Hermes, Béarn, and the Lexington-class aircraft carriers.
  Most early aircraft carriers were conversions of ships that were laid down as different ship types: cargo ships, cruisers, battlecruisers, or battleships. During the 1920s, several navies started ordering and building aircraft carriers that were specifically designed as such.
context_section_description: Aircraft carriers played a significant role in World War II. With seven aircraft carriers afloat, the Royal Navy had a considerable numerical advantage at the start of the war as neither the Germans nor the Italians had carriers of their own. However, the vulnerability of carriers compared to traditional battleships when forced into a gun-range encounter was quickly illustrated by the sinking of HMS Glorious by German battlecruisers during the Norwegian campaign in 1940. The first British warship lost in the war was HMS Courageous sunk by U-29 on 17 September 1939.
  The versatility of the carrier was demonstrated in November 1940 when HMS Illustrious launched a long-range strike on the Italian fleet at Taranto signalling the beginning of the effective mobile aircraft strikes, by short-ranged aircraft. This operation incapacitated three of the six battleships in the harbour at a cost of two of the 21 attacking Fairey Swordfish torpedo bombers. Carriers also played a major part in reinforcing Malta, both by transporting planes and by defending convoys sent to supply the besieged island. The use of carriers prevented the Italian Navy and land-based German aircraft from dominating the Mediterranean theatre.
  In the Atlantic, aircraft from HMS Ark Royal and HMS Victorious were responsible for slowing the German battleship Bismarck during May 1941. Later in the war, escort carriers proved their worth guarding convoys crossing the Atlantic and Arctic oceans.
  Germany and Italy also started with the construction or conversion of several aircraft carriers, but with the exception of the nearly finished Graf Zeppelin, no ship was launched.
  World War II in the Pacific Ocean involved clashes between aircraft carrier fleets. Japan started the war with ten aircraft carriers, the largest and most modern carrier fleet in the world at that time. There were seven American aircraft carriers at the beginning of the hostilities, although only three of them were operating in the Pacific.
  Drawing on the 1939 Japanese development of shallow-water modifications for aerial torpedoes and the 1940 British aerial attack on the Italian fleet at Taranto, the 1941 Japanese surprise attack on Pearl Harbor was a clear illustration of the power projection capability afforded by a large force of modern carriers. Concentrating six carriers in a single striking unit marked a turning point in naval history, as no other nation had fielded anything comparable.
  Meanwhile, the Japanese began their advance through Southeast Asia, and the sinking of Prince of Wales and Repulse by Japanese land-based aircraft proved in finality that aircraft, and aircraft carrying warships, would dominate the seas.  For the first time in naval history aircraft had sunk a battleship while maneuvering at sea and fighting back. In April 1942, the Japanese fast carrier strike force ranged into the Indian Ocean and sank shipping, including the damaged and undefended carrier HMS Hermes (1924). Smaller Allied fleets with inadequate aerial protection were forced to retreat or be destroyed. The Doolittle Raid, consisting of 16 B-25 Mitchell medium bombers launched from USS Hornet against Tokyo, forced the recall of the Japanese strike force to home waters. In the Battle of the Coral Sea, the world's first carrier battle and one in which fleets only exchanged blows with aircraft became a tactical victory for the Japanese, but a strategic victory for the allies. For the first time in history, at the Battle of Midway, a naval battle was decisively fought by aircraft and not warships; all four Japanese carriers engaged were sunk by planes from three American carriers (one of which was lost); the battle is considered the turning point of the war in the Pacific. Notably, the battle was orchestrated by the Japanese to draw out American carriers that had proven very elusive and troublesome to the Japanese.
  Subsequently, the US was able to build up large numbers of aircraft aboard a mixture of fleet, light and (newly commissioned) escort carriers, primarily with the introduction of the Essex-class in 194
caption: HMS Victorious during World War II
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