King Henry IV was the son of John of Gaunt and Blanche of Lancaster, and the first Lancastrian king. He began his reign usurping the unpopular king, Richard II, but spent the next 13 years defending his crown from rebellions and assassination attempts. Incessant opposition from the powerful Percy family and the ambitious Prince of Wales, Owain Glyndwr, wore down King Henry IV and the treasury. Talks of abdication from the Archbishop of Canterbury, and growing support for Henry IV’s son, Henry V, drove the king to exhaustion and eventually his death.