After the fall of the Berlin Wall the nation which broke up into many independent states was Yugoslavia. Before the fall of the Berlin Wall, Yugoslavia was just one country in southeastern Europe, but after the fall of the Berlin Wall, the country was divided into different socialist republics being: Bosnia and Herzegovina, Croatia, Macedonia, Montenegro, Slovenia and Serbia.
Yugoslavia broke up into many countries: Slovenia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro, and Macedonia (whose official name is the Former Yugoslav Republic of Macedonia.)
I think the most significant cause of World War one was the assassination of the Archduke Franz Ferdinand. The other causes of the war was Imperliasm, Militarism, Nationalism and Alliances that were formed.
