identities and sometimes relations between Muslim and Christian Albanians were tense. As a reaction against the Congress of Berlin, which had given some Albanian-populated territories to Serbia and Montenegro, Albanians, mostly from Kosovo, formed the League of Prizren in Prizren in June 1878. Hundreds of Albanian leaders gathered in Prizren and opposed the Serbian and Montenegrin jurisdiction. Serbia complained to the Western Powers that the promised territories were not being held because the Ottomans were hesitating to do that. Western Powers put pressure to the Ottomans and in 1881, the Ottoman Army started the fighting against Albanians. The Prizren League created a Provisional Government with a President, Prime Minister (Ymer Prizreni) and Ministries of War (Sylejman Vokshi) and Foreign Ministry (Abdyl Frashëri). After three years of war, the Albanians were defeated. Many of the leaders were executed and imprisoned. In 1910, an Albanian uprising spread from Pristina and lasted until the Ottoman Sultan's visit to Kosovo in June 1911. The aim of the League of Prizren was to unite the four Albanian-inhabited Vilayets by merging the majority of Albanian inhabitants within the Ottoman Empire into one Albanian vilayet. However at that time Serbs consisted about 25% of the whole Vilayet of Kosovo's overall population and were opposing the Albanian aims along with Turks and other Slavs in Kosovo, which prevented the Albanian movements from establishing their rule over Kosovo. 20th century In 1912 during the Balkan Wars, most of eastern Kosovo was taken by the Kingdom of Serbia, while the Kingdom of Montenegro took western Kosovo, which a majority of its inhabitants call "the plateau of Dukagjin" (Rrafshi i Dukagjinit) and the Serbs call Metohija (Метохија), a Greek word meant for the landed dependencies of a monastery. Aside from many war crimes and atrocities committed by the Serbian Army on the Albanian population, colonist Serb families moved into Kosovo, while the Albanian population was decreased. As a result, the proportion of Albanians in Kosovo declined from 75 percent at the time of the invasion to slightly more than 65% percent by 1941. The 1918–1929 period under the Kingdom of the Serbs, Croats and Slovenes was a time of persecution of the Kosovar Albanians. Kosovo was split into four counties—three being a part of official Serbia: Zvečan, Kosovo and southern Metohija; and one in Montenegro: northern Metohija. However, the new administration system since 26 April 1922 split Kosovo among three Regions