Kazani pit killings
Stari Grad, Bosnia and Herzegovina
During the Siege of Sarajevo in the Bosnian War, a number of predominantly ethnic Serbs living inside besieged Sarajevo were murdered by the forces of Mušan Topalović, commander of the 10th Mountain Brigade in the Army of the Republic of Bosnia and Herzegovina, and disposed of in the Kazani pit mass grave.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).