David Geoffrey Chandler (15 January 1934 – 10 October 2004) was a British historian whose study focused on the Napoleonic era. As a young man he served briefly in the army, reaching the rank of captain, and in later life he taught at the Royal Military Academy Sandhurst. Oxford University awarded him the D. Litt. in 1991. He held three visiting professorships: at Ohio State in 1970, at the Virginia Military Institute in 1988, and Marine Corps University in 1991. According to his obituary in The Daily Telegraph, his "comprehensive account of Napoleon's battles" (The Campaigns of Napoleon) is "unlikely to be improved upon, despite a legion of rivals. General de Gaulle wrote to Chandler in French declaring that he had surpassed every other writer about the Emperor's military career." He was also the author of a military biography of John Churchill, 1st Duke of Marlborough, and of The Art of Warfare in the Age of Marlborough, and contributed a number of articles on Napoleonic warfare to History Today magazine.