Hundred Years' War
The Hundred Years' War was a series of conflicts waged from 1337 to 1453 by the House of Plantagenet, rulers of the Kingdom of England, against the French House of Valois, over the right to rule the Kingdom of France. Each side drew many allies into the war. It was one of the most notable conflicts of the Middle Ages, in which five generations of kings from two rival dynasties fought for the throne of the largest kingdom in Western Europe. The war marked both the height of chivalry and its subsequent decline, and the development of strong national identities in both countries.
Second Hundred Years' War
Like the Hundred Years' War, this term does not describe a single military event but a persistent general state of war between the two primary belligerents. The use of the phrase as an overarching category indicates the interrelation of all the wars as components of the rivalry between France and Britain for world power. It was a war between and over the future of each state's colonial empires.