In the most detailed history of Union warships on the western waters of the Civil War, the author recounts the exploits of the timberclad ships Lexington, Tyler, and Conestoga. Converted to warships from commercial steamboats at the beginning of the conflict, the three formed the core of the North's Western Flotilla, later the Mississippi Squadron. The book focuses on the activities of these wooden warriors while providing context for the greater war, including accounts of their famous commanders, their roles in both large and small battles, ship-to-ship combat, and support for the armies of Gen. U.S. Grant and Gen. William T. Sherman.