About this Unit
The 3rd Battalion, 1st Marines (3/1), known as "Thundering Third," is an infantry battalion of the United States Marine Corps, first activated in March 1941. The battalion distinguished itself during World War II with notable action in the Pacific, including campaigns at Guadalcanal, New Britain, Peleliu, and Okinawa. In the Korean War, 3/1 participated in major operations such as the Inchon Landing and the Battle of Chosin Reservoir. More recently, 3/1 has deployed in support of Operation Iraqi Freedom, including heavy combat during the Second Battle of Fallujah, as well as operations in Afghanistan.
Historical Facts
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Establishment: The 3rd Battalion, 1st Marines (3/1) was first activated on March 1, 1941, at Guantanamo Bay, Cuba, as part of the build-up for World War II.
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Guadalcanal Campaign: 3/1 participated in the historic Guadalcanal Campaign in 1942, which marked the first major Allied offensive against Japan in the Pacific.
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Peleliu Assault: During the Battle of Peleliu in September 1944, 3/1 was involved in some of the fiercest fighting, suffering heavy casualties but playing a crucial role in securing the island.
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Korean War Heroics: 3/1 landed at Inchon in September 1950, a daring amphibious assault that turned the tide of the Korean War in favor of United Nations forces.
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Frozen Chosin: The battalion fought valiantly at the Chosin Reservoir, enduring brutal winter conditions and heavy enemy attacks, earning the nickname "The Chosin Few" alongside other Marine units.
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Vietnam War Operations: 3/1 was deployed to Vietnam in 1966 and participated in numerous operations, including Operation Hastings and Operation Hue City, facing intense jungle warfare.
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Operation Desert Storm: The battalion deployed to Southwest Asia in 1990-1991 as part of the liberation of Kuwait during the Gulf War.
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Battle of Fallujah: In 2004, 3/1 played a prominent role in Operation Phantom Fury (Second Battle of Fallujah), considered one of the bloodiest urban battles for Marines since the Vietnam War.
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Haditha Incident: In 2005, 3/1 was involved in the controversial Haditha incident in Iraq, leading to significant media attention and changes in rules of engagement and training.
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Motto and Legacy: The battalion's motto is "Thundering Third," and today 3/1 continues to serve as a deployable force, reflecting a proud legacy of valor and sacrifice in every major US conflict since World War II.
