Walter Markov (1909-1993) grew up in a century of historic importance. He lived through both World Wars (one of them in captivity), and experienced the rise and fall of the Kingdom of Yugoslavia and the “Machtergreifung” of Adolf Hitler. Born in Graz, Austria he had relocated many times at a young age already. Ultimately, Markov came to Bonn, Germany to pursue his studies in the fall of 1933. Together with four friends, in May 1934, he founded the “Gruppe Universität der KPD” to oppose Hitler and his followers. With the commitment of other supporters they spent nine months with this “illegal work” until the “Markov-Group” was betrayed by one of their members and arrested. In the court proceedings, Markov took over a major part of the responsibility, so while the others only received a light punishment or were even acquitted he was sentenced to twelve years in prison.The thesis focuses on the question how German resistance to Nazism could look like, using Walter Markov and his group as an example. It shows the main steps in the development of a resistance group, including motivation, members, organisation, work, arrests etc. A special focus lies on the persona of Walter Markov, in past research commonly referred to as the leader of the group.Various kinds of sources were used in this thesis. These include Markovs personal memories, taken from his autobiography or interviews. Moreover, articles in the “Sozialistische Republik”, the illegal newspaper published by the Markov-Group, were analysed to get a better impression of the resistance work. In order to obtain a comprehensive view, not only the perspective of Markov and his supporters was taken into account, but also Nazi police reports about attitudes and behaviours of German citizens. Through these kind of documents, as well as court documents detailing the case against Markov, valuable insights on how the Nazi regime took action against opponents and critics can be obtained.