Peter R. Mansoor, Retired Colonel, US Army, is the General Raymond E. Mason, Jr Chair of Military History at The Ohio State University. He assumed this position after a twenty-six year career in the US Army that culminated in his service as the executive officer to General David Petraeus, commanding general of Multi-National Force-Iraq, during the surge of US forces in 2007 and 2008. Williamson Murray is a Professor Emeritus of history at the Ohio State University. His work over the past fifty years focuses primarily on grand strategy, operations, and airpower. He has published numerous highly acclaimed works, including The Change in the European Balance of Power, 1938–1939: The Path to Ruin (1984), Strategy for Defeat: The Luftwaffe (1986), German Military Effectiveness (1992), The Air War in the Persian Gulf (1995) and A War to Be Won: Fighting the Second World War, 1937–1945 (2000).