Upper Silesia plebiscite
The disputed territory of Upper Silesia was subsequently divided between the two countries along voting lines (in the Upper Silesia plebiscite), with Poland receiving the eastern third of the area with the coal mines. The new border followed roughly the line separating the sides at the close of hostilities (see Upper Silesia plebiscite). The Annaberg itself remained part of Germany until 1945, when it was transferred to Poland according to the Potsdam Agreement.