High Quality Content by WIKIPEDIA articles! The V Amphibious Corps (VAC) was a formation of the United States Marine Corps and was composed of the 3rd, 4th and 5th Marine Divisions during World War II. They were the amphibious landing force for the United States Fifth Fleet and were notably involved in the battles for Tarawa and Saipan in 1944 and the Battle of Iwo Jima in 1945. During the course of the war, V Corps was initially commanded by General Holland `Howlin Mad` Smith and later by General Harry Schmidt.