1. Sea Power

The era of Sea Power was one of great transition for military naval vessels. It began with the soaring majesty of HMS Victory at the 1805 Battle of Trafalgar, and ended in the late 19th century with the forbidding armored bulk of HMS Warrior, precursor of the modern battleship. In just 50 years, sails gave way to steam. Oak hulls to iron plates. Fixed cannons to smaller, more accurate gun batteries with greater range and flexibility. The rules of naval warfare would never be the same.