... In May US Navy code breakers discovered the next move of the Imperial Navy an attack on Midway Island and the Aleutian islands.   Since the occupation of Midway by Japanese forces would give them an operational base less than 1000 miles from Pearl Harbor Admiral Chester Nimitz committed the bulk of his naval power, the carriers USS Enterprise CV-6, USS Yorktown CV-5 and USS Hornet CV-8 and their 8 escorting cruisers and 15 destroyers.  His force of 26 ships with 233 aircraft embarked to defend Midway while a force of 5 cruisers and 4 destroyers was dispatched to cover the Aleutians.  Midway itself had a mixed Marine, Navy and Army air group of 115 aircraft which included many obsolete aircraft, 32 PBY Catalina Flying Boats and 83 fighters, dive bombers, torpedo planes and Army Air Force bombers piloted by a host of inexperienced but resolute airmen...