Berlin Wall

Many different things led to the building of the Berlin Wall. One of them was that the Soviet Union allied themselves with the Allies during the war. Another was that the German territory was split into four different sections that were controlled by the Soviet Union, France, Great Britain, and the U.S. This created tension within the territories because of the different governments that watched over it. Finally, the Soviet Union controlled their territory as an authoritarian regime. They imposed the Iron Curtain and would not let the people leave.
Some people recount the day that the barbed wire went up, which eventually led to the concrete wall. They call the day barbed wire Sunday because the Berlin Wall started out as a chain link barbed wire fence. The people behind the Iron Curtain were monitored with wire taps and bugs. This was because the Soviets distrusted the citizens.
The events leading to the Berlin Wall being torn down was that the leader of the Soviet Union let the people in the Bloc voice their opinions. This was called the Sinatra Doctrine. Then the Hungarian border was opened, which was the second event that led to the Berlin Wall being torn down. The third blow was that they now allowed peaceful protesters, which came out in the thousands.

Works Cited

http://history.howstuffworks.com/historical-events/berlin-wall1.htm

http://www.apu.edu/articles/20393/

http://history.howstuffworks.com/historical-events/berlin-wall5.htm