sentences:  Most of Eric XIV's reign was then dominated by the Livonian War and the Scandinavian Seven Years' War against Denmark (1563–70), during which he successfully repelled most Danish attempts at conquest, but was unable to keep his own acquisitions.From 1563 onwards, his insanity became pronounced; his rule became even more arbitrary and marked by violence.His suspicion of the nobility led him to suspicions of the Sture family, then headed by Svante Stensson Sture, who was married to Gustav's sister-in-law.