Today in the Middle Ages: June 22, 1400

On June 22, 1400, Owain Glyndwr and his allies defeated in the English in the Battle of Bryn Glas.

The battle was the first important success in the Welsh rebellion against Henry IV. King Richard II had enjoyed Welsh loyalty, and when he was deposed by Henry Bolingbroke, they regarded the new ruler as illegitimate.

Henry Percy, called "Hotspur," was then miliary governor of North Wales and disagreed with Henry's harsh policy there, which he thought created instability. The progress and personalities of the rebellion are central to Shakespeare's Henry the Fourth, Part I.