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The Battle of the Philippine Sea (June 19–20, 1944) was a major naval battle of World War II that eliminated the Imperial Japanese Navy's ability to conduct large-scale carrier actions. It took place during the United States' amphibious invasion of the Mariana Islands during the Pacific War. The battle was the last of five major "carrier-versus-carrier" engagements between American and Japanese naval forces, and pitted elements of the United States Navy's Fifth Fleet against ships and aircraft of the Imperial Japanese Navy's Mobile Fleet and nearby island garrisons. This was the largest carrier-to-carrier battle in history, involving 24 aircraft carriers, deploying roughly 1,350 carrier-based aircraft.
The aerial part of the battle was nicknamed the Great Marianas Turkey Shoot by American aviators for the severely disproportional loss ratio inflicted upon Japanese aircraft by American pilots and anti-aircraft gunners. During a debriefing after the first two air battles, a pilot from USS Lexington remarked "Why, hell, it was just like an old-time turkey shoot down home!" The outcome is generally attributed to American improvements in training, tactics, technology (including the top-secret anti-aircraft proximity fuze), and ship and aircraft design.
During the course of the battle, American submarines torpedoed and sank two of the largest Japanese fleet carriers taking part in the battle. The American carriers launched a protracted strike, sinking one light carrier and damaging other ships, but most of the American aircraft returning to their carriers ran low on fuel as night fell. Eighty American planes were lost. Although at the time, the battle appeared to be a missed opportunity to destroy the Japanese fleet, the Imperial Japanese Navy had lost the bulk of its carrier air strength and would never recover. This battle, along with the Battle of Leyte Gulf, marked the end of Japanese aircraft carrier operations. The rest of the carriers remained mostly in port after this.
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