During the Vietnam War, a joint Army and Navy unit known as the Mobile Riverine Force (MRF) was established to operate in the maritime environment of the Mekong Delta. In the episode we talk about the Mobile Riverine Force with Erik Villard, the digital military historian at the U.S. Army Center of Military History and a historian of the Vietnam War. Villard is the author of "Combat Operations: Staying the Course, October 1967 to September 1968."