Jochen Böhler is a Research Fellow at the Imre Kertész Kolleg in Jena, where he teaches courses on the history of early twentieth-century Central and Eastern Europe. His most recent publications include, War, Pacification, and Mass Murder, 1939: The Einsatzgruppen in Poland (2014) alongside Jurgen Matthäus and Klaus-Michael Mallmann, Legacies of Violence: Eastern Europe's First World War (2014) with Joachim von Puttkamer and Wlodzimierz Borodziej and The Waffen-SS. A European History (2016) with Robert Gerwarth.