He commanded the second division of the French army at the Battle of Agincourt. When the English broke through the first division, he led a countercharge. He is sometimes credited with killing Edward, Duke of York, wounding Humphrey, Duke of Gloucester, and cutting an ornament from the crown of Henry V of England; but he was then overpowered by the King's bodyguard, and slain by the Welsh nobleman Dafydd Gam before he could yield himself.