Battle of Midway
In the time it took Japan to build three carriers, the U.S. Navy commissioned more than two dozen fleet and light fleet carriers, and numerous escort carriers. By 1942 the United States was already three years into a shipbuilding plan which aimed make the navy larger than Japan's. The greater number of USN aviators survived the Battle of Midway and subsequent battles of 1942, and combined with growing pilot training programs, the US had many skilled pilots.