CCB 18 is a Command and Control Boat that supported the mission of Task Force 117, the Mobile Riverine Force. As originally envisioned, the Mobile Riverine Force would support an infantry brigade and an artillery battalion using a variety of modified landing craft, support ships and specially designed assault boats. In essence, this strike unit would be a self-contained amphibious assault force, complete with all support elements except aircraft. The Mobile Riverine Force was comprised of U.S. Navy personnel plus a brigade from the 9th Infantry Division chosen to provide the infantry component of the Mobile Riverine Force.
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