Sometime in 1948 NATO decided to launch Operation Unthinkable after years of preparation. 10 targets in the Soviet Union and in countries occupied by the Soviet Union after World War 2 were bombed using Nuclear bombs, alongside a ground invasion from NATO troops into East Germany. During the war the Soviet Union established the Warsaw Pact (later renamed to the Moscow Pact), consisting of the Soviet Union, Bulgaria, Czechoslovakia, East Germany, Hungary, Poland, Romania and Albania. After a swift advance and the threat of more Nuclear bombs being dropped by NATO, the Soviet Union surrendered. The Treaty of Berlin was signed, consisting of the following:
- West and East Germany would be united into a single German state, and this state's Eastern borders were to be restored to Germany's pre-World War 2 borders (excluding Danzig).
- Germany were to become a NATO member.
- Poland's borders were to be restored to its pre-World War 2 borders.
- Poland were to become a NATO member.
- All Soviet Union troops were to retreat out of Austria.
- Both NATO and the Moscow Pact would not let Austria join their organizations for 20 years.
- All Soviet Union troops were to retreat out of Czechoslovakia.
- Czechoslovakia would leave the Warsaw Pact/Moscow Pact immediately, under the condition that it would stay neutral for 20 years.
- Both NATO and the Moscow Pact would not let Yugoslavia join their organizations for 20 years.
- Both NATO and the Moscow Pact would not let Finland join their organizations for 20 years.
- Carpathian Ruthenia (former territory of Czechoslovakia) would become a part of Czechoslovakia again.
- Danzig would join Poland.
- The Memel Territory (Klaipėda Region) would join East Prussia (Germany).
- Due to the Memel Territory joining East Prussia (Germany), a small part of East Prussia would be ceded to Poland as war reparations.
Not part of the Treaty of Berlin:
- NATO would recognize the Baltic states (Estonia, Latvia and Lithuania) as independent, however the Soviet Union kept control of them.