About this Unit
The 4th Battalion, 12th Marines (4/12) was an artillery battalion of the United States Marine Corps, initially activated during World War II. The unit provided crucial fire support during the Pacific campaign, notably participating in the battles of Iwo Jima and Okinawa. After the war, 4/12 was deactivated but was later reactivated and served in various capacities, including deployments to Okinawa and support roles in the Vietnam War. The battalion has since been deactivated, but its legacy endures as part of the proud history of the 12th Marine Regiment.
Historical Facts
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Unit Designation: The 4th Battalion, 12th Marines (4/12) was an artillery battalion of the United States Marine Corps, part of the 3rd Marine Division.
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World War II Origins: The 12th Marine Regiment, to which 4/12 belonged, was first activated in 1942 and played a key role in the Pacific campaigns during World War II.
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Vietnam War Service: 4/12 Marines saw extensive combat during the Vietnam War, providing artillery support for infantry operations in I Corps, including the defense of Khe Sanh.
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Khe Sanh Siege: Elements of 4/12 were instrumental in supporting the Marine base at Khe Sanh during the 77-day siege in 1968, one of the longest and bloodiest battles of the war.
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Nickname: The battalion was sometimes referred to as "The Thunder Battalion," a nod to the devastating firepower of its artillery batteries.
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Rotation with 3/12: After Vietnam, 4/12 alternated with 3/12 Marines to serve as the artillery battalion for the 3rd Marine Division, especially in Okinawa, Japan.
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Deactivation and Reactivation: Over its history, 4/12 was deactivated and reactivated several times, reflecting changes in the Marine Corps’ force structure and overseas commitments.
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Cold War Presence: During the Cold War, 4/12 was an integral part of the U.S. forward-deployed force in the Western Pacific, prepared for rapid response to regional crises.
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Variety of Artillery: The unit was equipped with a range of artillery pieces over the years, including the M101 105mm howitzer, M114 155mm howitzer, and later, more modern artillery.
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Legacy: Although 4/12 was eventually deactivated, its history and honors are preserved by the 12th Marine Regiment, and its veterans remain active in Marine Corps associations.
