<Dd> French--Thai </Dd> <Dd> Ecuadorian--Peruvian War </Dd> <P> The Invasion of Poland, known in Poland as the September Campaign (Kampania wrześniowa) or the 1939 Defensive War (Wojna obronna 1939 roku), and in Germany as the Poland Campaign (Polenfeldzug) or Fall Weiss ("Case White"), was a joint invasion of Poland by Nazi Germany, the Soviet Union, the Free City of Danzig, and a small Slovak contingent, that marked the beginning of World War II . The German invasion began on 1 September 1939, one week after the signing of the Molotov--Ribbentrop Pact, while the Soviet invasion commenced on 17 September following the Molotov - Tōgō agreement that terminated the Russian and Japanese hostilities in the east on 16 September . The campaign ended on 6 October with Germany and the Soviet Union dividing and annexing the whole of Poland under the terms of the German--Soviet Frontier Treaty . </P> <P> German forces invaded Poland from the north, south, and west the morning after the Gleiwitz incident . As the Wehrmacht advanced, Polish forces withdrew from their forward bases of operation close to the Polish--German border to more established lines of defence to the east . After the mid-September Polish defeat in the Battle of the Bzura, the Germans gained an undisputed advantage . Polish forces then withdrew to the southeast where they prepared for a long defence of the Romanian Bridgehead and awaited expected support and relief from France and the United Kingdom . While those two countries had pacts with Poland and had declared war on Germany on 3 September, in the end their aid to Poland was very limited . </P>

Who won the war between germany and poland