"As Soviet forces swept through Poland, the Germans evacuated thousands of concentration camp prisoners. After long, brutal marches, more than 10,000 prisoners from Auschwitz and Gross-Rosen, most of them Jews, arrived in Buchenwald in January 1945. In early April 1945, as U.S. forces approached, the Germans evacuated around 30,000 prisoners from Buchenwald and its subcamps. About a third of these prisoners died from exhaustion or were shot by the SS. An underground prisoner resistance organization in Buchenwald saved many lives by obstructing Nazi orders and delaying the evacuation. On April 11, 1945, in expectation of liberation, starving prisoners stormed the watchtowers, seizing control of the camp. Later that day, American forces entered Buchenwald. Soldiers from the 6th Armored Division found more than 21,000 people. Between July 1937 and April 1945, the SS imprisoned some 250,000 persons from across Europe in Buchenwald. Exact mortality figures can only be estimated, as camp authorities did not keep complete records. The SS murdered at least 56,000 male prisoners in the Buchenwald camp system, some 11,000 of them Jews." (https://www.ushmm.org/wlc/en/article.php?ModuleId=10007979).