1st Marine Amphibious Corps | |
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![]() 1st Marine Amphibious Corps insignia | |
Active | 1 October 1942 to 15 April 1944 |
Country | United States |
Branch | USMC |
Engagements | Invasion of Bougainville |
The I Marine Amphibious Corps, or I MAC, was a formation of the United States Marine Corps. It was created on 1 October 1942, with most of the staff transferred from Amphibious Corps, Pacific Fleet (ACPF). It was then deployed to the South Pacific Area – a U.S.-led multinational military command active during World War II that was a part of the U.S. Pacific Ocean Areas – first to Hawaii, then to New Caledonia.[1]