This is the first published comprehensive survey of naval action on the Mississippi River and her tributaries for the years 1863-1865. Following introductory reviews of the rivers and of the U.S. Navy's Mississippi Squadron, chronological Federal naval participation in various raids and larger campaigns is highlighted, as well as counterinsurgency, economical support and control, and logistical protection. It includes details on units, locations, or activities that have been previously underreported or completely ignored. Examples include the birth and function of the Mississippi Squadron's 11th District, the role of U.S. Army gunboats, and the war on the Upper Cumberland and Upper Tennessee Rivers. The last chapter details the coming of the peace in 1865 and the decommissioning of the U.S. river navy and the sale of its gunboats.