 Complete the following phrase:  The Bartians, together with the Warmians and the Natangians, were conquered by the Teutonic Knights 1238-1240. In Barta the Knights built major castles in Bartenstein and Rößel. In 1242, just two years after their conquest, Bartians rebelled and managed to resist until 1252. During the Great Prussian Uprising 1260-1274, that started after the Knights suffered a major loss in the 