Task Force 117

Task Force 117, also known as the Mobile Riverine Force, was a joint U.S. Army and Navy formation established during the Vietnam War in 1966. Its primary mission was to conduct riverine operations in the Mekong Delta, a region crisscrossed by waterways and heavily contested by Viet Cong forces. Comprising specially modified boats and army infantry, Task Force 117 executed search-and-destroy missions, troop transport, and fire support in difficult terrain inaccessible to traditional vehicles. The unit played a pivotal role in major operations such as the Tet Offensive and contributed significantly to disrupting enemy supply lines and strongholds in South Vietnam. Task Force 117 was disbanded in 1971 as U.S. involvement in Vietnam decreased.