The Berlin Wall fell figuratively on 9 November 1989 and literally in the following days as it was chipped away piece by piece by Berliners.
The wall sprung up almost overnight in the summer of 1961 and held up for almost three decades. It divided Berlin, geographically in the Soviet territory, between Allies from the World War in the west and the Soviet Union in the east.
Soviets and Allies fought over the control of Berlin long before the wall was built. The division was a result of World War II and created a major and flourishing capitalist city in communist Europe. The Soviet Union tried blocking access to West Berlin to purge the Westerners out, but they supplied the city by air in what was later called the Berlin Airlift. The Americans, Brits and the French on the other side seemed to have in mind a unification of their sectors of Berlin (and even created a joint currency) and attempts at gaining control from the Russians were failing.
Over the 1950s, the Cold War progressed, and the USSR became encouraged by the successful launch of the Sputnik satellite. Meanwhile, Easterners kept migrating to Western Berlin, leaving the East without many of its young doctors, teachers, scientists, and other highly valued workers and students. The Berlin Wall put a stop to their flow to the other side.
In 1961, the wall suddenly made it impossible to cross the border to go to work or to see a play, it divided families and friends. People who tried to get over and got caught were killed, or killed themselves trying to get across. A few succeeded. Getting in and out of the Western bubble in the USSR was officially only possible using three checkpoints. Until in 1989, as the USSR was losing its hold on eastern Europe, it was decided that people would be once more able to cross without a threat to their life.
The announcement was followed by what was essentially a street party. Berliners drank in the streets and brought hammers to pick away at the concrete that had been standing between them and their loved ones for almost 30 years. Their efforts were soon joined by machinery and the wall was taken apart. Its remains are still in Berlin, standing as a symbolic divide between the East and the West, and a memorial to celebrate and to educate.