Disagreements between the united states and the soviet union about postwar europe start the cold war.

The statement above is TRUE.
The United States and the Soviet Union had always been wary of each other. American did not favor the practice of communism that operated in Russia and also despised their leader Joseph Stalin who was a tyrant and he made terrible laws, which the people of his country have to abide with. The Russia on the other hand do not like Americans because America refuse to recognize them as part of the international community. Also, the Russian were bitter against Americans because they joined the World War ll late, thus coming to Russian aid at a late hour after many Russian soldiers had lost their lives. All these grievances developed into cold war between the two nations after the war.

Ithink it is called reservation