After the German attack on the Soviet Union in June 1941, the district of Białystok, which included the Białystok, Bielsk Podlaski, Grajewo, Łomża, Sokółka, Volkovysk, and Grodno Counties, was "attached to" (not incorporated into) East Prussia, whilst Eastern Galicia (District of Galicia), which included the cities of Lwów, Stanislawów and Tarnopol, was made part of the General Government.