Gordon is a Fellow of the
Royal Historical Society and assisted with the drafting of British Maritime Doctrine (BR 1806), and Fighting Instructions. In its Summer 2006 edition,
History Today published an article by Brian James, describing how three military historians,
Christina Goulter and
Gary Sheffield as well as Gordon, who teach on the higher command and staff course at Shrivenham, had reached the conclusion that it was the Royal Navy and not the
Royal Air Force that prevented a
German invasion of the
British Isles in 1940 during the
Second World War. The article quotes Andrew Gordon stating "It really is time to put away this enduring myth. To claim that Germany failed to invade in 1940 because of what was done by phenomenally brave and skilled young men of
Fighter Command is hogwash. The Germans stayed away because while the Royal Navy existed they had not a hope in hell of capturing these islands. The Navy had ships in sufficient numbers to have overwhelmed any invasion fleet." On publication the article drew some attention, despite it not being a wholly original new thesis, having been first posited by
Duncan Grinnell-Milne in his book
Silent Victory (1940). From 2007 to 2009 Gordon was on loan to the
United States Naval Academy from his position as Reader in Maritime History at the
Joint Services Command and Staff College at
Shrivenham, in
Wiltshire. As of September 2025, his biography of Admiral Sir
Bertram Ramsay which was due for release in 2019 has yet to appear.. ==Publications==