sent to the camp including the Grand Master of the Grand Orient of the Netherlands, , who died there in March 1941, after being arrested by Klaus Barbie. Aftermath At the end of 1944, Himmler ordered the execution of every prisoner. Sick inmates were executed in the industrial yard, including at least 2,000, or transferred to death camps. In February 1945, more than 1,300 prisoners were executed during the evacuation of the Lieberose forced labor camp, a subsidiary of Sachsenhausen. With the advance of the Red Army in the spring of 1945, Sachsenhausen was prepared for evacuation. On 21 April, the camp's SS staff ordered 33,000 inmates on a forced march northwest. Most of the prisoners were physically exhausted and thousands did not survive this death march; those who collapsed en route were shot by the SS. The march ended near Raben Steinfeld in early May, after liberation by the Red Army and US Army. On 22 April 1945, the camp's remaining 3,400 inmates were liberated by the 1st Belorussian Front and the Polish 2nd Infantry Division. According to an article published on 13 December 2001 in The New York Times: "In the early years of the war the SS practiced methods of mass killing there that were later used in the Nazi death camps. Of the roughly 30,000 wartime victims at Sachsenhausen, most were Russian prisoners of war". NKVD special camp Nr. 7 / Soviet Special Camp Nr. 1 (1945–1950) After the last of the liberated concentration camp prisoners had left the site in the summer of 1945, the camp was used as a special camp by the Soviet military administration from August 1945 until 1950. Nazi functionaries were held in the camp, as were political prisoners and inmates sentenced by Soviet Military Tribunals. In the beginning, 150 prisoners from NKVD special camp Nr. 7 Weesow near Werneuchen arrived in Sachsenhausen. Apart from the crematorium and the extermination facility, almost all buildings from the former concentration camp were used again (especially the wooden barracks, the camp prison and the utility buildings). Towards the end of 1945, the camp was again fully occupied (12,000 people). In the following year, up to 16,000 people were imprisoned in the camp at times. About 2,000 female prisoners lived in a separate area of the camp. By 1948, Sachsenhausen, now renamed "Special Camp No. 1", was the largest of three special camps in the