BJ Armstrong, PhD is an Assistant Professor of War Studies and Naval History with the History Department of the U.S. Naval Academy. He is a U.S. Navy officer and has served as a search and rescue and naval special warfare helicopter pilot, the Officer-in-Charge of an amphibious helicopter gunship detachment, and in the Pentagon as a strategic analyst and staff officer. He holds a PhD in War Studies from King's College, London and is the editor of the 21st Century Foundations series from the Naval Institute Press, which includes his books "21st Century Sims: Innovation, Education, and Leadership" for the Modern Era and "21st Century Mahan: Sound Military Conclusions for the Modern Era."