What role did Germany in general and Berlin in particular, play in the evolution of the Cold War?
Germany played a major role in the Cold War. It served as a place where the East and West came into contact with one another and it served to intensify some of the Cold War conflicts.
The split of Germany and Berlin caused the Cold War to become more intense in its early days. The West and the Soviets started to come into conflict about things like the degree to which West Germany would be allowed to become unified. The Soviets used West Berlin as a pawn in this conflict, most notably in the Berlin Airlift. In these ways, the presence of a divided Germany and a divided Berlin created opportunities for the East and West to come into conflict with one another.