after world war ii berlin was divided into four sectors and was controlled and administered jointly by allied powers, the great britain, the united states of america, france and the soviet union.
later we see the germany/berlin was divided into east berlin and west berlin by berlin wall and each part was controlled by communist block and capitalist block. it became the center of conflict during the cold war and after the fall of berlin wall, the germany got unified and it also lead to fall of soviet union in 1989.
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