About this Unit
River Division 111 (RivDiv 111) was a unit of the United States Navy's Mobile Riverine Force during the Vietnam War. Established in 1967, RivDiv 111 operated heavily armed Patrol Boat, River (PBR) craft to conduct river patrols, interdiction, and support operations primarily in the Mekong Delta. The unit played a critical role in Operation Game Warden, aimed at denying Viet Cong forces the use of vital waterways for movement and supply. RivDiv 111 engaged in numerous combat encounters, often under heavy fire, and contributed significantly to controlling the complex riverine environment until its deactivation in 1970.
Historical Facts
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River Division 111 (RivDiv 111) was one of the original Mobile Riverine Force units in the Vietnam War, operating mainly in the Mekong Delta’s complex waterways.
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RivDiv 111 was part of Task Force 117, which was a joint U.S. Navy and Army force designed to conduct riverine operations against Viet Cong insurgents.
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The unit primarily operated Patrol Boat, River (PBR) and Armored Troop Carriers (ATCs), enabling rapid troop movement and fire support in shallow, narrow rivers.
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RivDiv 111 played a key role in Operation Giant Slingshot (1968-69), interdicting Viet Cong supply routes along the Vam Co Dong and Vam Co Tay Rivers near the Cambodian border.
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The division’s boats were heavily armed, often mounting twin .50 caliber machine guns, grenade launchers, and sometimes even flamethrowers for close-quarters river combat.
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Members of RivDiv 111 frequently endured ambushes from concealed enemy positions, with engagements often at extremely close range and lasting mere minutes.
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RivDiv 111 was noted for its close cooperation with the 9th Infantry Division, ferrying infantry and providing gunfire support during operations such as the Tet Offensive of 1968.
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The unit received numerous commendations and several sailors earned individual awards for valor, including the Navy Cross and Silver Star.
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Life aboard RivDiv 111’s boats was difficult: crews endured heat, insects, and constant danger, leading to a strong sense of camaraderie among the sailors.
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After the Vietnam War, RivDiv 111’s legacy has been preserved by veteran associations and reunions, and its story is often featured in books and documentaries about the brown-water navy.
