Geoffrey's son Fulk III Nerra ("the Black"; 21 July 98721 June 1040) gained fame both as a warrior and for the pilgrimages he undertook to the Holy Sepulchre in Jerusalem to atone for his deeds. He found himself confronted on his accession with a coalition of Odo I, count of Blois, and Conan I of Rennes. The latter having seized upon Nantes, of which the counts of Anjou held themselves to be suzerains, Fulk Nerra came and laid siege to it, routing Conan's army at the battle of Conquereuil (27 June 992) and re-establishing Nantes under his own suzerainty. Then turning his attention to the count of Blois, he proceeded to establish a fortress at Langeais, a few miles from Tours, from which, thanks to the intervention of the king Hugh Capet, Odo failed to oust him. On the death of Odo I, Fulk seized Tours (996); but King Robert the Pious turned against him and took the town again (997). In 997 Fulk took the fortress of Montsoreau. In 1016 a fresh struggle arose between Fulk and Odo II, the new count of Blois. Odo II was utterly defeated at Pontlevoy (6 July 1016), and a few years later, while Odo was besieging Montboyau, Fulk surprised and took Saumur (1026).