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Revolution in Russia
Historians believed this is what started the Cold War.
On November 1917, Bolsheviks took power.
On August 23, 1939, The Soviet Union and Germany signed a treaty known as the German–Soviet Non-aggression Pact.
On June 22, 1941, Germany broke the pact and invaded the Soviet Union. -
Interwar Diplomacy
February 1919, the Polish-Soviet war started.
In 1927, Stalin declared that peaceful coexistence with the capitalist countries is receding into the past.
In 1936, The Great Purge occurred which was the execution of more than half a million soviets.
On Sep 1, 1939, World War 2 started. -
Cold War
In 1947, the Cold War started.
The Berlin Blockade in 1948 was the first major crisis of the Cold War.
In 1991, the Soviet Union collapsed.
