Known also as Henry of Bolingbroke, Henry IV ascended to the throne after his cousin Richard II was deposed (this Henry was the grandson of Edward III). He immediately had to deal with rebellions by both the Welsh and those closer to home and his reign was riddled with plots against him. There’s nothing too notable about Henry IV other than his participations in the on-going Crusades and the War of the Roses, but really didn’t accomplish much. He was also the first native English-speaking king (his predecessors had spoken French).