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.
European wars of religion
The Thirty Years' War was fought between 1618 and 1648, principally on the territory of today's Germany, and involved most of the major European powers. Beginning as a religious conflict between Protestants and Catholics in the Holy Roman Empire, it gradually developed into a general war involving much of Europe, for reasons not necessarily related to religion. The war marked a continuation of the France-Habsburg rivalry for pre-eminence in Europe, which led later to direct war between France and Spain. Military intervention by external powers such as Denmark and Sweden on the Protestant side increased the duration of the war and the extent of its devastation. In the latter stages of the war, Catholic France, fearful of an increase in Habsburg power, also intervened on the Protestant side.
The major impact of the Thirty Years' War, in which mercenary armies were extensively used, was the devastation of entire regions scavenged bare by the foraging armies. Episodes of widespread famine and disease devastated the population of the German states and, to a lesser extent, the Low Countries and Italy, while bankrupting many of the powers involved. The war ended with the Treaty of Münster, a part of the wider Peace of Westphalia.