Answer:
Siding with Germany in World War I may have been the most significant reason for the Ottoman Empire's demise. Before the war, the Ottoman Empire had signed a secret treaty with Germany, which turned out to be a very bad choice. ... Instead, he argues, World War I triggered the empire's disintegration.
Firstly, The Berlin Wall was built as a symbol of the Cold War and to separate East and West Berlin. To prevent emigration from East Berlin into West Berlin or any other part of Germany.
The Fall of Berlin wall - It was torn down because East Berlin wanted yearned to be one free country with West Berlin. The destruction of the wall was celebrated all over the world.
Bronze Metal is your answer