 The 2nd Battalion , 9th Marines were part of the reserve forces for the Battle of Iwo Jima and were committed to the action five days after D @-@ Day . Among the Marines who distinguished themselves on Iwo Jima was Private Wilson D. Watson who received the Medal of Honor . After the island was secured , the unit was sent back to Guam where they underwent training for a possible invasion of the Japanese mainland . The invasion never occurred since hostilities between Japan and the United States came to an end . The 2nd Battalion , 9th Marines was sent to Camp <unk> where , in December 1945 , it was once again disbanded . 
