W. Chales de Beaulieu was chief of the General Staff of Panzer Group 4 during World War II, under commander Erich Hoepner. He was discharged from service in early 1945 following Hoepner's involvement with the 20 July plot.
Linden Lyons holds a master’s degree in history from Monash University in Melbourne, Australia. He also studied German at the University of Freiburg and librarianship at the University of Canberra. He is the translator for Panzer Operations, Vitebsk, and Leningrad in the Die Wehrmacht im Kampf series.