Japan’s efforts to establish clear naval and air superiority in the western Pacific first hit a snag in the Battle of the Coral Sea in May 1942, when the U.S. fleet turned back a Japanese invasion force headed for New Guinea. Despite the setback, Admiral Isaroku Yamamoto, commander of the Imperial Japanese Navy, was convinced his forces enjoyed a numerical advantage over the Americans.
Hoping to replicate the success of the Pearl Harbor attack, Yamamoto decided to seek out and crush the rest of the U.S. Pacific fleet with a surprise attack aimed at the Allied base at Midway Island. Midway is located in the Pacific Ocean almost directly in between the United States and Japan.
After a diversionary attack by a smaller Japanese force on the Aleutian Islands, off the coast of Alaska, Yamamoto planned a three-pronged approach toward Midway. First, an air attack on the island launched from four first-line Japanese aircraft carriers, the Akagi, Kaga, Hiryu and Soryu, commanded by Vice Admiral Chuichi Nagumo. Second, an invasion force of ships and soldiers led by Vice Admiral Nobutake Kondo. And finally, once expected U.S. reinforcements from Pearl Harbor arrived, a joint strike by Nagumo’s forces and Yamamoto’s own fleet, which would be waiting 600 miles to the west.