[3] Pierre was governor of Anjou, Maine,[4] Provence,[2] and captain of Angers responsible for the defense of the city against the English during the Hundred Years War.
[5] He was delegated by Louis III of Anjou in 1429 to supervise the renovations to the castle of Tarascon,[6] and captain of the tower of Taranto.
[7] With Tanneguy du Chastel, Pierre was instrumental in getting dauphin Charles out of Paris, during the capture of the capital by the Burgundians on 29 May 1418.
[8] On 10 September 1419, Pierre was present at the meeting at Montereau,[9] where John, Duke of Burgundy was murdered.
[9] Pierre supported Louis III of Anjou's bid for the kingdom of Naples in 1424 and 1427, becoming governor of Calabria.