These are Buchenwald concentration camp guards who have gotten a beating from the prisoners upon liberation of camp by the Americans. The picture was taken in April 1945, by the U.S. military photographer Elizabeth Miller.
In the formative years of Nazi Germany, Adolf Hitler ordered the euthanasia program, codenamed Aktion T4, to eliminate those “unworthy of life”. The first series of murders were by starvation, then lethal injection before finally evolving to the gas chamber and cremation. Unlike in the concentration camps doctors, not soldiers, were put in charge of deciding those who were executed. Over 400,000 Germans were sterilized while just about 200,000 were exterminated.