sentences:  Odo II died in battle in 1037 and was succeeded by his son, Theobald; on receiving the news of his rival's demise, Fulk set about recapturing Château de Langeais.The siege began in the winter of 1037 and in the spring of the following year, with no relief forthcoming, the garrison surrendered.Fulk set his sights on further territorial gains and successfully captured Château de Chinon away.