 He temporarily took control of part of Greater Poland after the death of his ally Przemysł II, lost it, and then subsequently regained it.Władysław was a skilled military leader, but also an administrator - he conquered Gdansk Pomerania, and left it to familial governors.For the defense of this territory, he turned to the Teutonic Knights, who then demanded an exorbitant sum or the land itself as an alternative.