2. The Second Stage
During this period, there were reports by credible international organizations regarding the ethnic cleansing and war crimes against ethnic Albanians living in Kosovo, such as the Report of the International Commission to Inquire into the Causes and Conduct of the Balkan War by the Carnegie Endowment for International Peace.
The Russian Marxist revolutionary, Leon Trotsky, at that time had reported about the ethnic cleansing, the crimes against humanity, and Serbia's national efforts to exterminate and change the ethnical composition of the Albanian people living in Kosovo. The Albanian people who lived in Kosovo remained occupied and were not allowed to join Albania, who declared its independence from the Ottoman Empire in 1912, because the Great Powers of that time had other interests, and wanted to maintain their power in the region.
Consequently, the policies of assimilation, colonisation, conversion to the Orthodox religion, and denial of the Albanian language, except for the areas inhabited by Albanians, despite such rights being granted to other ethnical groups, continued in the territory of Kosovo, inhabited by a majority of Albanians.
Another important event that has to be noted is the Bujan Conference, which took place at the end of World War II, when legitimate representatives of Kosovo, through a Resolution, expressed their willingness to make use of the right to self-determination and join Albania, as it was promised to them by the Yugoslavian communists and allied forces. Regardless of the will expressed by Kosovo, the latter in 1945 was included in Yugoslavia as an autochthonous province, against the will of the people and its legitimate representatives.