In late January 1945, SS and police officials forced 4,000 prisoners to evacuate Blechhammer, a subcamp of Auschwitz-Monowitz, on foot. The SS murdered about 800 prisoners during the march to the Gross-Rosen concentration camp. SS officials also killed as many as 200 prisoners left behind in Blechhammer as a result of illness or successful attempts to hide. After a brief delay, the SS transported around 3,000 Blechhammer prisoners from Gross-Rosen to Buchenwald concentration camp in Germany.
On January 27, 1945, the Soviet army entered Auschwitz, Birkenau, and Monowitz and liberated around 7,000 prisoners, most of whom were ill and dying. It is estimated that the SS and police deported at a minimum 1.3 million people to Auschwitz complex between 1940 and 1945. Of these, the camp authorities murdered 1.1 million.