Roger Cirillo served in the US Army from 1971 to 1995, retiring with the rank of Lieutenant Colonel. He served in armored cavalry units in the United States, Korea, and West Germany, on the staff and faculty of the Air Defense and Armor Schools. He was a War Plans Officer in NATO Army Central Group and served in the CINC office, USAREUR. He taught military history at the US Army Command and Staff College and has a Ph.D. in military history from Cranfield University at the Royal Military College of Science, Shrivenham, UK. He is the author of the Ardennes-Alsace Campaign and other publications and assisted in the publication of more than 30 military history books for the Association of the United States Army. He is the editor of the «American Warrior» series and the «Battles and Campaigns» series for the University Press of Kentucky.