Henry III, last Valois king, faced the climax of the Wars of Religion, the Catholic League, and the succession crisis that brought Henry IV to the throne.
League and succession
After the death of the Duke of Anjou, the Protestant Henry of Navarre became heir—provoking the League and Spanish intervention.
Assassination
Henry III had the Guise leaders killed (1588), was himself assassinated in 1589, and designated Navarre as successor—beginning the Bourbon dynasty.