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Italy was determined to carve out an empire in the Mediterranean. Consequently Britain was hostile.
Germany and most other European nations simply wanted to destroy Stalin's Soviet Union, permanently ending the communist threat. Unfortunately the German Government was foolish enough to align themselves with Japan and Italy. The governments of Britain and the USA were even more foolish to align themselves with the Soviet Union. Stalin must have jumped for joy at the opportunity to conquer Europe with American and British assistance.
.Italian efforts vs Britain were doomed to failure. So were Japanese efforts vs the USA.
IMO the nations of Europe were not doomed to become Soviet property. The key is for Germany not to align with Italy and Japan. That would allow the nations of Europe to fight the Soviet Union without Britain and the USA coming to Stalin's assistance.
I doubt it would happen that way.
Assumption. Anglo-German detente established during 1935 lasts at least until the death of PM Chamberlain.
November 1938 German-Polish Treaty.
Perhaps Britain will serve as mediator.
This settles the border dispute between Germany and Poland.
August 1939.
No Non-aggression pact between Germany and the Soviet Union. For Germany this treaty was an act of last resort to prevent the Soviet Union from signing a military alliance with Britain.
Poland, Romania, Finland, Latvia, Lithuania and Estonia all have good reason to fear Stalin. They will sign a defensive military alliance with Germany. Rather like a 1940 version of NATO.
What happens next is unpredictable. There might be a cold war stand off between Europe and the Soviet Union. Or one of the numerous border disputes between the Soviet Union and its neighbors to the west might spark off a war. If it comes to war the Soviets will lose without American and British assistance.
Germany tried hard to reach a diplomatic agreement with Poland for about a year prior to September 1939. Germany wanted Danzig (which was 90+ percent German) plus road and rail links across the Polish corridor. Britain encouraged Poland to reject any German offers and unilaterally gave Poland a military guarantee (which they later broke).
=davebender;856882]Real world diplomacy is almost never that simple. WWII was no exception.
During the spring of 1941 either the Soviet Union or Britain (sources disagree) arranged for a military coup in Yugoslavia to get rid of a government that was friendly towards Germany. For the German government this was the final straw. They couldn't allow Stalin to meddle in Yugoslavia anymore then they could allow Britain to meddle in Norway.