- The Invasion of Poland was conducted by the German Army in WWII. It sparked off WWII
The invasion of Poland started on September 1st 1939 and ended on October 6 that same year. One week before the invasionbegan the Molotov Ribbentrop Act was signed by the U.S.S.R and NaziGermany. It ended with Russia [U.S.S.R.]and Germany annexing the east and west halves of Poland respectively.