Adrian R. Lewis is David B. Pittaway Professor of Military History at the University of Kansas. Lewis earned his PhD at the University of Chicago. He has researched and written extensively on war, national security, and military affairs for over twenty years. He has taught at the United States Military Academy, West Point, the University of California, Berkeley, and the University of North Texas, Denton. He has also taught the Strategy and Policy Course for the Naval War College. Lewis specializes and teaches courses in twentieth century warfare, World War II, the Cold War, the Korean and Vietnam Wars, and more recent military operations. His publications have been required reading at the Naval War College and the U.S. Army Command and General Staff College. His publications include: The American Culture of War: A History of U.S. Military Force from World War II to Operation Enduring Freedom (3rd edition, 2018) and Omaha Beach: A Flawed Victor (2001), still considered the best analysis of the Normandy Invasion. Lewis has published numerous journal articles and book chapters. Lewis is a retired soldier, Infantry. He served as both an enlisted-man and an officer. He served with the 9th Infantry Division and 2nd Ranger Battalion.