where he found his three uncles and a cousin. Those selected for work were loaded onto trucks and transported to labor camps. Frankenthal was sent to Auschwitz III Monowitz. As they arrived, the inmates were forced to strip naked and were sent to their barracks where their bodies were shaved. They then had their inmate numbers tattooed onto their arms. Frankenthal became 104920 and his brother 104921. The inmates were then sorted out according to skills. The brothers both claimed to be locksmiths, although they had only begun training at the workshop in Dortmund. They were then showered and issued with their striped uniforms. The Blockältester, or inmate block leader, then greeted the new arrivals to inform them of their current situation: they were in an extermination camp, and any family members, whom they could not see in this block, had probably already been gassed. The inmates in Frankenthal's block were composed mainly of Jews, with several political prisoners as well. The prisoners were forced to work under horrendous conditions for long hours. The inmates also worked alongside civilian workers from the Polish and German populations who instructed the inmates inside the camp, but not inside the electric fence. Most of the prisoners in Monowitz worked for IG Farben in Liquidation. During his internment at the camp, Frankenthal played a minor role in the largely unsuccessful resistance. He was also subject to dental experiments from SS doctors. On 18 January 1945, the death march began for the prisoners of Auschwitz. On the second day of the march the group reached Gleiwitz (Gliwice), where they were loaded onto open cattle wagons and sent to Buchenwald concentration camp. Upon arrival the SS soldiers accompanying the Auschwitz inmates discovered that Buchenwald was full, and could no longer take on any inmates. From Buchenwald they were then sent to Mittelbau-Dora, a new site for the V2 production since bombing raids on the Peenemünde facility threatened to end the project. Here the inmates built V2 rockets in an underground factory. When the inmates began the deliberate sabotage of German rockets, prisoners were hanged from the ceiling as a warning to the other workers. During an aerial bombardment of the camp on 3 April 1945, Frankenthal, his brother, and another inmate managed to escape. In the confusion the brothers were separated from the third fugitive. After three days they were recaptured by a group of Volkssturm