Eward III (13 November 1312 – 21 June 1377) was one of the most successful English monarchs of the Middle Ages. Restoring royal authority after the disastrous reign of his father, Edward II, Edward III went on to transform the Kingdom of England into the most efficient military power in Europe. His reign saw vital developments in legislature and government—in particular the evolution of the English parliament—as well as the ravages of the Black Death. He remained on the throne for 50 years; no English monarch had reigned for as long since Henry III, and none would again until George III.