(SS-TV), meaning 'Death's-Head Units', was the SS organization responsible for administering the Nazi concentration camps for the Third Reich. The SS-TV was an independent unit within the SS with its own ranks and command structure. It ran the camps throughout Germany, such as Dachau and Buchenwald; in Nazi-occupied Europe, it ran Auschwitz in German occupied Poland and Mauthausen in Austria as well as numerous other concentration and death camps. The death camps' primary function was genocide and included Treblinka, Bełżec extermination camp and Sobibor. It was responsible for facilitating the Final Solution, known since as the Holocaust, in collaboration with the Reich Main Security Office and the SS Economic and Administrative Main Office. These troops wore the SS-TV skull and crossbones rather than the SS-VT 'SS' runes.