When Edward II abdicated, in the face of an invasion led by Queen Isabella and her lover, Roger Mortimer, they installed Isabella and Edward's fourteen-year-old son on the throne as King Edward III of England. For the first three years of his reign, Mortimer was the de facto rule of the kingdom, with Edward as little more than a figurehead, but in 1330 he rebelled with a few trusted allies. Mortimer was executed, and he took the power of the crown for himself.
He was to go on to become one of the longest-reigning English monarchs. Among medieval monarchs, only Henry III's reign lasted longer than his fifty years. The 1330s saw Edward establishing himself as a powerful military campaigner: he sought to undermine the long-standing …
Editors. "Reign of King Edward III". The Literary Encyclopedia. First published 31 July 2012
[http://www.litencyc.com/php/stopics.php?rec=true&UID=617, accessed 18 January 2017.]