Kulmerland
The Prussians launched raids against the Chełmno Land, where the Knights first established themselves in late 1220s. The apparent aim of these raids were to force the Knights to devote as many troops in defense of Chełmno as possible so that they could not organize raids deep into Prussian territory. As other clans became preoccupied fending off Teutonic attacks from their forts, only Diwanus and his Bartians were able to continue the war in the west. They made several minor expeditions to Chełmno Land each year.