America's Fortress: A History of Fort Jefferson, Dry Tortugas, Florida

A little-known Civil War outpost that was the most heavily armed coastal defense fort in United States history

Known as the "American Gibraltar," Fort Jefferson, located in the Dry Tortugas, Florida, was the most heavily armed coastal defense fort in United States history. Perceived as the nation's leading maximum-security prison, the fort also held several of the accused conspirators in the Lincoln assassination. America's Fortress is the first book-length, architectural, military, environm...