(born Oct. 31, 1895, Paris, France—died Jan. 29, 1970, Marlow, Buckinghamshire, Eng.) British military historian and strategist. He left Cambridge University to join the British army at the outbreak of World War I and retired as a captain in 1927. He was an early advocate of air power and mechanized tank warfare. He wrote for London newspapers from 1925 to 1945. His writings on strategy, which emphasized the elements of mobility and surprise, were more influential in Germany than in France or England; his “expanding torrent” theory of attack became the basis for German blitzkrieg warfare in 1939–41. The author of more than 30 books, he was knighted in 1966.
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Henry George Liddell (February 6, 1811 – January 18, 1898) was Vice-Chancellor of Oxford University, Dean (1855-91) of Christ Church, Oxford, headmaster (1846–55) of Westminster School, author of A History of Rome (1857), and co-author (with Robert Scott) of the monumental work A Greek-English Lexicon, which is still used by students of Greek. His daughter Alice Liddell was the Alice for whom Lewis Carroll wrote Alice's Adventures in Wonderland.
While he was Dean of Christ Church, he arranged for the building of a new choir school and classrooms for the staff and pupils of Christ Church Cathedral School on its present site. Before then the school was housed within Christ Church College itself.
His mother was the former Charlotte Lyon (1785 - 1871), a daughter of Thomas Lyon (1741 - 1796) (who was the youngest son of the 8th Earl of Strathmore and Kinghorne) and the former Mary Wren (died 1811).