upright|thumb|At the outbreak of World War II, both Nazi Germany and the Soviet Union invaded Poland; by October 1939, they had divided the occupied territory between them in accordance with the secret part of the Molotov–Ribbentrop Pact.
upright|thumb|at the outbreak of world war ii both nazi germany and the soviet union invaded poland; by october 1939 they had divided the occupied territory between them in accordance with the secret part of the molotov–ribbentrop pact