Although he never learned to write, he endowed a school with revenue to provide poor students with an education. Fulk also undertook four pilgrimages to Jerusalem. He was the son of Geoffrey I of Anjou, also known as Geoffrey "Grisegonelle", and Adélaide of Vermandois. He had an older sister: Hermengarde (b. 960), who married Conan of Brittany and a younger brother Geoffrey. A half-brother, Maurice, was born in 980. Fulk married Elisabeth de Vendôme (~979–999), daughter of Count Bouchard of Vendome, and they had a daughter: Elisabeth's death was recounted in the "Chronicles of Saint-Florent": Elisabeth occupied the citadel at Anger with some supporters and while under siege from Fulk, she suffered a fall from a great height, and then was burnt at the stake for adultery. Fulk married Hildegarde de Sundgau, whose family was from Lorraine, around December 1005. They had two children:  Fulk Nerra's first victory was in June 992 at Battle of Conquereuil, where he managed to defeat Conan I, Duke of Brittany. Conan's territorial ambitions had been quashed by Geoffroy Grisgonelle in 980, and seven years later, he planned an ambush on Angers while Fulk was at the crowning of Robert the Pious. Fulk and his men foiled the ambush, killing Conan's son, Alain, in the process. In 992 Fulk laid siege to Conan's castle at Nantes, but he slipped away to Conquereuil. Conan was killed in the battle, and Fulk installed a governor/regent, as the succeeding count was a child. While Fulk and Eudes II fought many skirmishes over territory and alliances, their biggest battle occurred in July 1016 at Battle of Pontlevoy. Eudes marched 10,000 men southward toward Fulk's tower at Montboyau; meanwhile, Fulk and his much smaller group attacked him from behind. Fulk's men were routed, retreated, and Eudes, thinking the battle won, went for a swim in the Cher River. Reinforcements led by Herbert Wake-Dog of Maine arrived to help Fulk, fought and routed Eudes' surprised men. Several thousand were reported killed. Fulk also undertook four pilgrimages to Jerusalem--first and second as a penitent seeking forgiveness for sins and third and fourth to protect pilgrims.