Tristan IV was made Grand Master of the Household of the King of Sicily. In 1425 he became Guard and Captain of the Château de Loudun. However, Tristan left again for Naples with King Louis in 1429. He participated in the victory of Aquila and was rewarded with the government of the region of Reggio. Louis never become effective King of Naples and died of malaria at Cosenza in 1434. The following year, his brother René of Anjou was named King of Naples. Tristan died in Reggio soon afterwards.