Gregory Fremont-Barnes holds a doctorate in Modern History from Oxford University and serves as a Senior Lecturer in War Studies at the Royal Military Academy Sandhurst, dividing his work between teaching cadets on site and commissioned officers of the British Army posted to garrisons throughout the UK and abroad.
His writing focuses principally on the military and naval history of the 18th and 19th centuries and includes such works as The French Revolutionary Wars, The Boer War, The Peninsular War and The Indian Mutiny. He has edited two major reference works, the three-volume Encyclopedia of the French Revolutionary and Napoleonic Wars and the two-volume Encyclopedia of the Age of Political Revolutions and New Ideologies, 1760–1815, and co-edited the five-volume Encyclopedia of the American Revolutionary War.