During World War II, Heinrich Himmler headed the Nazi's SS and took a keen interest in the Nazi medical experiments conducted across the Third Reich. Sigmund Rascher (1909-1945), once a respected physician, was a Himmler associate who tried to use their relationship to his advantage. Rascher and others conducted experiments on prisoners in various concentration camps and across the Third Reich. Racscher's experiments at the Concentration Camp Dachau were judged inhumane and criminal during the Nuremberg trial of other Nazi medical professionals. Alexander procured copies of captured documents to aid in his investigations of Nazi medical experiments. Types of materials include reports and correspondence between Racher, Himmler, and other Nazi officials. The majority of materials in this subseries are photocopies of original documents and in German. Materials date from 1939 to 1943.