Mark Ethan GrotelueschenMark E. Grotelueschen is a Lieutenant Colonel in the USAF. He holds degrees from the USAF Academy, the University of Calgary and Texas A&M University. He is the author of Doctrine under Trial: American Artillery Employment in World War I (2001). He hs twice served as a Professor of History at the USAF Academy in Colorado Springs, holding the positions of Deputy for Military History, Deputy for American History, and Chair of the Africa Area Studies Group. He is currently serving on the staff of the United States Air Forces Africa Command at Ramstein Air Base, Germany. Read More Read Less