Air Marshal Sir Patrick Henry Lyon Playfair, (22 November 1889 – 23 November 1974) was a commander in the Royal Flying Corps during the First World War and a senior commander in the Royal Air Force until his retirement during the Second World War. In 1945 Playfair published Warfare Today: How Modern Battles Are Planned and Fought on Land, at Sea, and in the Air, co-written by Major General J. F. C. Fuller and Admiral Sir Reginald Bacon.