The document summarizes the key events and outcomes of the Battle of Midway in June 1942. The U.S. Navy, with three carriers against Japan's four carriers and other naval forces, was able to turn the tide in the Pacific through code breaking, carrier tactics, and pilot heroism. This pivotal American victory prevented a Japanese advance on Midway Island and the western U.S., and marked the transition to U.S. naval dominance in the Pacific for the remainder of World War II.