The battle considered the turning point in the Pacific Theater during World War II is the Battle of Midway, fought from June 4 to June 7, 1942. This decisive naval battle saw the United States Navy significantly weaken the Japanese fleet by sinking four of its aircraft carriers. Prior to Midway, Japan had consistently expanded its territories across the Pacific. However, the U.S. victory at Midway altered the momentum of the war, allowing the Allies to take the offensive in the Pacific, ultimately leading to Japan's defeat and the end of the war in 1945.