After Gerberga died Fulk made another political marriage. He married Adelaide, the widow of Alan II, Duke of Brittany. Alan II had also been Count of Nantes and the marriage probably gave Fulk control of Nantes. Adelaide was also the sister of Theobald I, Count of Blois. This allowed Fulk II to form an alliance with the House of Blois. Fulk died in 960. He was succeeded by his son Geoffrey Greymantle.