Interpret maps- what does the map show about berlin in 1949?

This map shows that in 1949 Berlin was part of East Germany, thus under the rule of the Soviet Union. After the World War II ended, Germany was divided into two parts, West Germany and East Germany. West Germany was governed by the USA, France, and the United Kingdom, while East Germany was under the control of the Soviet Union. Berlin was under the control of the Soviets as it was part of East Germany. This meant that it was under the rule and influence of the communism, moving this part of Germany in total opposite direction than the western part of the country.

increase in population

a drastic rise in oil prices ended decades of postwar.