United States -- History -- 2 Automation -- 1 Battleships -- 1 Causes 1 Civil rights -- 1 Civil war, 1861-1865 1 more ... Civil war, 1861-1865 -- 1 Congresses 1 Congresses -- 1 Libraries -- 1 Libraries and electronic publishing -- 1 Library information networks -- 1 Modern -- 1 Naval history -- 1 Reconstruction (U.S. history, 1865-1877) 1 Sea-power -- 1 Slavery -- 1 Slaves -- 1 less ...