The Berlin wall was a wall which went straight through the city of Berlin. After WW2 did East Berlin belonged to the East Germany and the West Berlin belonged to the West Germnay. The West Berlin was a part in the middle of the East Germany. East Germany was a communistic dictatorship and the inhabitatns was not allowed to leave the country. Before the wall was built, a lot of people fled the border of East Berlin to West Berlin. To put a stop to this, the East German government built the wall in August 1961.