USS Thrusher:Mobile Riverine Force 13 and 15

**USS Thrasher/Mobile Riverine Force 13 and 15** were key elements of the United States Navy’s brown-water operations during the Vietnam War. The Mobile Riverine Force (MRF), a joint Army-Navy force, was established in 1967 to conduct riverine assault and interdiction missions in the Mekong Delta, with Task Force 117 as its naval component. Assault Support Patrol Boats (ASPBs) like the USS Thrasher provided vital firepower, troop transport, and security along Vietnam’s complex waterways. Units 13 and 15 frequently engaged in search-and-destroy operations, convoy escorts, and amphibious landings, playing a crucial role in disrupting Viet Cong supply lines and supporting ground forces in the delta’s hostile terrain. Their actions significantly contributed to U.S. efforts to control key river networks and stabilize the region during the conflict.