barnim iv died in 1365. his sons wartislaw vi and bogislaw vi inherited his share in the government. they supported wartislaw v against bogislaw v. the dispute degenerated into a civil war and emperor charles iv intervened. he authorized a committee of arbitration, which included the lübeck city council. on 25 may 1368, the dukes agreed on a preliminary division of pomerania-wolgast, in which wartislaw v received the land of neustettin. the final division was made on 8 june 1372.