The key battle of the Pacific during World War II is often considered to be the Battle of Midway, which took place from June 4 to June 7, 1942. This crucial battle marked a significant turning point in the war in the Pacific Theater.
In the Battle of Midway, the United States Navy, having deciphered Japanese naval codes, was able to anticipate and respond to the Japanese attack. The U.S. forces achieved a decisive victory by sinking four Japanese aircraft carriers—Akagi, Kaga, Soryu, and Hiryu—while losing only one carrier, the USS Yorktown. This significant loss for Japan weakened its naval capabilities and shifted the balance of power in the Pacific towards the United States, allowing the Allies to begin a series of offensives that would eventually lead to Japan's defeat.
Other notable battles in the Pacific include the Battle of Guadalcanal, the Battle of the Philippine Sea, and the Battle of Iwo Jima, but Midway is often highlighted for its strategic importance.