In late January 1945 Auschwitz SS administration started the evacuation of 58 thousands of work capable prisoners into the III Reich interior, this initiated the infamous Auschwitz Death Marches. The hectic evacuation of the camp due to the fast approaching Soviet army was also encompassing the massive destruction of physical evidence of mass extermination project carried at the camp grounds from spring 1942 till late 1944. This included mass burning of camp records, removal of buried corpses and ashes, burning of Canada (prisoner's property) barracks. Finally on January 20th the SS blew up Crematoria, Gas Chamber number II and III and on January 26th the same was done with Crematoria, Gas Chamber number V. The similar building number IV was previously damaged and partly burned after the mutiny of Sondercommando prisoners on October 1944.
On the the 27th of January 1945 the Red Army troops entered the Auschwitz-Birkenau grounds liberating the entire large complex of camps with over 7000 emaciated prisoners still alive. This event gave an end to almost five years history of German Nazi Concentration and Extermination Camp Auschwitz-Birkenau which took lives of up to one and a half million of human beings, mainly Jews.