google :
Who committed the most war crimes in Yugoslavia?
Serbian military
War crimes. Numerous war crimes were committed by Serbian military and Serbian paramilitary forces during the Yugoslav Wars. The crimes included massacres, ethnic cleansing, systematic rape, crimes against humanity.
and
How many Bosnians died in the Yugoslav war?
around 100,000 people
The Bosnian War resulted in the death of
around 100,000 people, and the displacement of over two million men, women and children. A campaign of war crimes, 'ethnic cleansing' and genocide was perpetrated by Bosnian Serb troops under the orders of Slobodan Milošević.
and
wiki;
the international courts, then during the
Srebrenica massacre, 8000 Bosnian Muslim men and boys were murdered and the remainder of the population (between 25000 and 30000 Bosniak women, children and elderly people) was forced to leave the area. If a wider definition is used, then the number is much larger.
According to the ICTY Demographic Unit, an estimated 69.8% or 25,609 of the civilians killed in the war were Bosniak (with 42,501 military deaths), with the Bosnian Serbs suffering 7,480 civilian casualties (15,299 military deaths), the Bosnian Croats suffering 1,675 civilian casualties (7,183 military deaths), amounting to a total of 104,732 casualties, spread between the
Bosnian Croats (8.5%), Bosnian Serbs (21.7%), Bosniaks (65%), and others (4.8%)
en.wikipedia.org