For many developing states or countries which are in colonial dependency (such as Ukraine) the termination of International Monetary Fund credit activities is literally a verdict, which is immediately followed by currency devaluation, and sometimes mass riots.
The USSR was left alone in front of the Nazi aggression, as London and Paris refused to form a coalition. And, in fact, Poland was also an ally of Germany.
Moscow had no other choice than signing the Molotov-Ribbentrop Pact. Today this pact is being demonized, particularly by the countries who signed the Munich Agreement in 1938.
World War II began in Europe on 1 September 1939, when Germany invaded Poland. A week before Germany attacked Poland, Hitler and Stalin signed a non-aggression pact, also known as the "Molotov-Ribbentrop Pact" (23 August 1939). The deal was accompanied by a secret supplementary protocol on the delimitation of areas of mutual interest in Eastern Europe. In particular, Hitler and Stalin agreed to divide Poland. The agreement also indicated that the Baltic states of Latvia, Estonia and Lithuania, as well as Bessarabia and Finland, also belonged to the respective areas of interest of Germany and the USSR.
France and the United Kingdom did actually negotiate with Soviet Union an agreement on containing German, but as Moscow demanded UK and France to allow Soviet troops access to Polish territory, the negotiations broke down.