Molotov–Ribbentrop Pact on 14 June 1940 was not legal in that it did not involve the agreement of the three nations
therefore, the review in question is not legal either
The Molotov-Ribbentrop Pact was in August 1939, a few days before Germany invaded Poland, but provided for dividing up Eastern Europe between Hitler and Stalin. Stalin moved into the Baltic states in June 1940.
23 August 1939.
Good point, though.