In 1945, U.S. soldiers liberated the Buchenwald concentration camp. Although not technically an extermination camp (prisoners were used as slave labor in local armament factories), mass killings took place at Buchenwald, and many inmates died in the course of gruesome medical experiments. Elie Wiesel, who went on to write stirring accounts of the Holocaust, for which he earned the Nobel Peace Prize, was an inmate at Buchenwald. Toward the end of the war, the Nazis evacuated inmates from Buchenwald to Flossenberg, where they were liberated.