Philip III of France sibling Peter, Count of Perche and Alençon
Philip III (1 May 1245 – 5 October 1285), called the Bold (French: le Hardi), was King of France from 1270 until his death in 1285. His father, Louis IX, died in Tunis during the Eighth Crusade. Philip, who was accompanying him, returned to France and was anointed king at Reims in 1271.
Philip inherited numerous territorial lands during his reign, the most notable being the County of Toulouse, which was annexed to the royal domain in 1271. With the Treaty of Orléans, he expanded French influence into the Kingdom of Navarre and following the death of his brother Peter during the Sicilian Vespers, the County of Alençon was returned to the crown lands.
Following the Sicilian Vespers, Philip led the Aragonese Crusade in support of his uncle. Initially successful, Philip, his army racked with sickness, was forced to retreat and died from dysentery in Perpignan in 1285. He was succeeded by his son Philip IV.Sicilian Vespers
In 1282, King Peter III of Aragon invaded Sicily, instigating the Sicilian Vespers rebellion against King Charles I of Naples, Philip's uncle. The success of the rebellion and invasion led to the coronation of Peter as king of Sicily on 4 September 1282. Pope Martin IV excommunicated Peter and declared his kingdom forfeit. Martin then granted Aragon to Philip's son, Charles, Count of Valois. Philip's brother, Peter, Count of Perche, who had joined Charles to suppress the rebellion, was killed in Reggio Calabria. He died without issue and the County of Alençon returned to the royal domain in 1286.
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