Complex sentence: In 1945 Ostheim became part of the American controlled zone, in the Free State of Bavaria; in 1947 it was formally transferred to Bavarian control in exchange for some similar exclaves in the Soviet Zone.
Split into simpler sentences: In 1945 Ostheim became part of the American controlled zone, in the Free State of Bavaria. In 1947 it was formally transferred to Bavarian control in exchange for some similar exclaves in the Soviet Zone.