In 1203, King Valdemar II of Denmark conquered the area later comprising Saxe-Lauenburg, but it reverted to Albert I, Duke of Saxony in 1227. In 1260, Albert I's sons Albert II and John I succeeded their father. In 1269, 1272 and 1282, the brothers gradually divided their governing competences within the three territorially unconnected Saxon areas along the Elbe river (one called Land of Hadeln, another around Lauenburg upon Elbe and the third around Wittenberg upon Elbe), thus preparing a partition.