[SunkenCiv]

Treaty of Nonaggression Between Germany and the Union of Soviet
Socialist Republics [1939]
http://avalon.law.yale.edu/20th_century/nonagres.asp

[ScaniaBoy]

SC,

Your link to the Molotov-Ribbentrop non-aggression treaty linked to the official treaty. The next page shows the Secret Additional Protocol whereby Nazi Germany and the Soviet Union divided Poland, the Baltic states, and parts of southern Europe (Bessarabia) between themselves. World War II had in fact started as soon as the signatures had been affixed to the treaty:

http://avalon.law.yale.edu/20th_century/addsepro.asp