In 1991, the republics of Yugoslavia fell into disarray, and aligned themselves on ethnic and cultural fronts. The old geographic divisions of the country fell apart, and war broke out between various states, including Slovenia, Croatia, Bosnia and Herzegovina, Macedonia, and Serbia and Montenegro. Later, in 2006, Montenegro and Serbia also broke apart, and both declared their independence as separate countries in a referendum. Most recently, Kosovo unilaterally declared its independence from Serbia in 2008. Thus, over the course of just seventeen years, seven new countries were added to the map of the world.