Walter Chales de BeaulieuChales 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. He later wrote this book on th advance of Panzer Group 4, and a biography of Erich Hoepner. Read More Read Less