Submarines have progressed from the crude steam-driven craft of the Civil War to silent nuclear transports that can cruise for months without surfacing and carry intercontinental missiles mounting multiple warheads. Go back to the earliest experimental submersibles, the notorious German U-Boats of World War II that nearly destroyed the Allies' efforts, and follow the progress of over 280 other types. Notations are also included on civilian uses of subs as well as every important underwater weapon, for a truly comprehensive reference.