 In 1292 Bohemian troops, through numerical superiority and with support from Silesian princes and the Margrave of Brandenburg, drove Władysław the Short first from Sandomierz, and in September of that same year surrounded him in a fortified Sieradz.The siege was soon successful, and Władysław and his brother Casimir II found themselves in captivity.On 9 October 1292 an agreement was signed under which Władysław and Casimir II were forced to renounce claims to Lesser Poland and to make fealty to the Czech ruler, in return for which they remained on their Kujawy leases.