Groß-Rosen, the stone hell that was the site of much suffering from its initial establishment as a subcamp of KZ-Sachsenhausen in 1940, to the eventual liberation by Soviet troops some five years later, today marks the 70th anniversary of its liberation. The SS began the evacuation of the eastern Groß-Rosen satellite camps during January 1945, with the dereliction of the Stammlager (main camp) coming in early February. Subsequently, further subcamps were abandoned causing at least 44,000 prisoners to be escorted under SS guard to camps further from the approaching Soviets such as Mauthausen, Mittelbau-Dora, Neuengamme, Dachau, Buchenwald, Bergen-Belsen and Floßenbürg. Those who were too weak to continue were killed by the SS. With little to nothing being provided in the way of food and water, the casualties were high. Soviet forces eventually reached the site on February 13th 1945. Estimates suggest a minimum of, 40,000 people died within the Groß-Rosen system, or during the evacuations.