- who; Joseph Stalin
- where: Germany
- the East Germany decides to close the German border
- construction of Berlin wall began August 17
- 37,800 people successfully traversed from east to west
- blockade ended in may 12, 1949 and Soviet Union gave in two planes
- Berlin wall complex system of wall, trenches, and watchtowers
- it divided east and west Berlin
- 5,000 people escaped from east to west, 200 people died trying to escape
- in 1961 the Berlin wall border closed