The numbers on the arms are from prisoners of Nazi concentration camps. The numbers replaced their names while at the camps and they were tattooed on so that they could be easily tracked by the Germans. This is why we study history. So this never happens again.
A woman weeps during the deportation of Jews from Ioannina. Greece. on March 25, 1944. The deportation was enforced by the German army. Almost all of the people deported were murdered on or shortly after April 11, 1944, when the train carrying them reached Auschwitz-Birkenau.