The Margraviate of Brandenburg also sought to control the area and in the following armed conflict, the Polish duke Władysław I the Elbow-high called for the support of the Teutonic Knights.After paying off the Brandenburg margraves, the Teutonic knights integrated the Pomerelian lands into their monastic state, with the Lauenburg and Bütow Landmarking its western border with the Pomeranian duchy.In 1455 Poland promised the Lauenburg and Bütow Land to Duke Eric II of Pomerania in return for his support, yet the towns were still held by the Knights' troops.When the Order's defeat and 1466 Second Peace of Thorn ended the war, those troops were paid off and King Casimir IV Jagiellon of Poland again granted the towns to the Griffins, though it was disputed whether as his trustees or in pawn, while the rest of Pomerelia became part of Royal Prussia.While much of the Pomerelian lands annexed by Prussia returned to the Second Polish Republic after World War I according to the 1919 Treaty of Versailles, Lauenburg and Bütow remained with the Prussian province of Pomerania until 1945.
Polish–Lithuanian Commonwealth in 1648
Lordships of Lauenburg and Bütow (identified as Buto) on a map of
Farther Pomerania
in the 18th century (on the r. h. s., western border marked in red)