Austria-Hungary
During World War I, internment camps were set up, mostly for Serbs and other pro-Kingdom of Serbia supporters; the radical pan-Serbian black hand having played a role in the assassination of the Austro-Hungarian Archduke Franz Ferdinand resulting in the outbreak of World War I. Citizens deemed enemies of the state were displaced from their homes and sent to camps throughout the Austria-Hungary Empire, to places such as Doboj (46,000), Arad, Győr and Neusiedl am See.
During the Nazi period, several concentration camps, for example the Mauthausen-Gusen camp, were located in Austria. These camps were overwhelmingly run by Austrian members of the NAZI party.
Read more about this topic: List Of Concentration And Internment Camps