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- John Knox Laughton
- T. E. Lawrence – colloquially known as "Lawrence of Arabia"
- Leo VI the Wise – Byzantine emperor (Taktika)
- John David Lewis
- B. H. Liddell-Hart – proponent of the "indirect approach", influential in all 20th-century military thinking
- William S. Lind
- Liu Ji – Huolongjing
- Stephen B. Luce
- Edward Luttwack – theorist, identified the 'Dynamic Paradox' of strategy
Read more about this topic: List Of Military Writers