Before the aggression, Bosniaks, Serbs, Croats, Yugoslavs and Others lived together in Vlasenica. According to the 1991 census, there were 33,942 inhabitants in Vlasenica: 18,727 Bosniaks (55.17%), 14,359 Serbs (42.30%), 39 Croats (0.11%), 340 Yugoslavs (1.00%) and 477 Others (1.24%). At the same time, in the town of Vlasenica lived 7,909 inhabitants: 4,800 Bosniaks (60.69%), 2,743 Serbs (34.68), 26 Croats (0.33%), 242 Yugoslavs (3.06%) and 98 Others. 1.24%). The population of the Municipality lived in the town of Vlasenica and 90 other settlements. Vlasenica, as a strategically important city in the plans and goals of the aggressors, has been the target of attacks since 1991. Aggression and war crimes against Bosniaks were planned, prepared and organized against this Bosnian town. Camps for Bosniaks were organized in Vlasenica, civilians were killed and then “buried” in mass graves, mass and systematic rapes and other forms of sexual violence were committed, the Bosniak elite was targeted and persecuted, civilians were expelled and deported en masse, and cultural goods and property and demolished religious buildings. After the war, he began returning to Vlasenica. However, this area has long been an area of precarious living for Bosniak returnees. Thus, on July 11, 2001, a 16-year-old girl, Meliha Durić, was killed in Vlasenica. This crime has not been solved. In the Bosnian entity of RS, the Bosnian language is denied. Teaching in the Bosnian language is prohibited, and the language is called the non-existent Bosniak language. This discriminates against students who want their language to be called Bosnian. The situation with employment in public administration is not good. Returnees are mainly engaged in agriculture and animal husbandry, but there is a problem with the placement of surplus products. In 2013, a census was conducted in Bosnia and Herzegovina. It was the first census after the war and aggression. In the municipality of Vlasenica, a significant part of which belonged to the municipality of Milici, there were 11,467 inhabitants: 3,763 Bosniaks, 7,589 Serbs, 31 Croats, 22 persons who did not declare their ethnicity, 15 Others, 14 without answers. The town of Vlasenica had 6,715 inhabitants, which is 1,194 fewer than in 1991. There were 967 or 3,633 fewer Bosniaks than in 1991. There were 5,679 or 2,936 more Serbs than in 1991. The municipality of Vlasenica had, in the total population, 33.82% Bosniaks, which is 21.35% less than in 1991, and 66.18% Serbs, which is 23.88% more than in 1991. In the town of Vlasenica, there were 14.40% Bosniaks and 84.50% Serbs in the total population. There were 46.29% less Bosniaks and 49.89% more Serbs. The population of Vlasenica lived in 36 settlements of the municipality, which is 55 settlements less than in 1991. The causes of such changes in the ethnic structure of the population of Vlasenica can be traced to the aggression against the Republic of Bosnia and Herzegovina, ethnic cleansing and genocide against Bosniaks. Certainly, other causes of the decrease in the number of Bosniaks in Vlasenica should not be neglected, such as the security situation, economic situation, education, road and other infrastructure, etc. The formation of the municipality of Milići significantly affected the reduction of the population of Vlasenica. Milići has 11,441 inhabitants: Serbs 7,180 or 62.76%, Bosniaks 4,199 or 36.70% of the total population. The population of Milić lives in 51 settlements.