Zbruch River
Upon signing of the Molotov–Ribbentrop Pact, Nazi Germany and Soviet Union partitioned Poland and its Eastern Borderlands were secured by the Soviet buffer republics with Ukraine securing the territory of Eastern Galicia. The Soviet September Polish campaign in Soviet propaganda was portrayed as the Golden September for Ukrainians, given the unification of Ukrainian lands on both banks of Zbruch River, until then the border between the Soviet Union and the Polish communities inhabited by Ukrainian speaking families.