23 Aug 1939Molotov–Ribbentrop Pact signedbtn Soviet Union & Germany
1 Sep 1939Germanyinvades Poland
3 Sep 1939British & French declarewar on Germany
17 Sep–6 Oct 1939Soviets invadeeastern Poland
29 Sep–10 Oct 1939Soviet Union forcesEstonia, Latvia, andLithuania to sign pactsof mutual assistance