In 1343, Casimir settled several high-level arbitration disputes with the Teutonic Order by a territorial compromise that culminated in the Treaty of Kalisz of 1343.
Aastal 1343 lahendas Kazimierz mitu kõrgetasemelist vahekohtuvaidlust Saksa orduga territoriaalse kompromissiga, mis tipnes 1343. aasta Kaliszi lepinguga.