On October 24, 1944, in the initial phase of the Battle of Leyte Gulf, in the Philippines, he became the only American airman to achieve "ace in a day" status twice. McCampbell and his wingman attacked a Japanese force of 60 aircraft. McCampbell shot down nine—seven Zeros and two Oscars—setting a U.S. single-mission aerial combat record. During this same action, his wingman downed another six Japanese warplanes. When he landed his Grumman F6F Hellcat aboard USS "Langley" (the flight deck of "Essex" wasn't clear), his six machine guns had just two rounds remaining, and his airplane had to be manually released from the arrestor wire due to complete fuel exhaustion. Commander McCampbell received the Medal of Honor for both actions, becoming the only Fast Carrier Task Force pilot to be so honored.