Dr Stephen A. Hart is senior lecturer in the War Studies department, the Royal Military Academy Sandhurst. Prior to this, he lectured in the International Studies Department at the University of Surrey, and in the War Studies Department, King's College London. He is the author of Montgomery and the "'Colossal Cracks': The 21st Army Group in Northwest Europe 1944-45 "(Praeger, 2000), and has co-authored - with Russell Hart - several popular histories of the German Army in the Second World War. The author lives in Surrey, UK.