Major General Sir Ernest Dunlop Swinton, KBE, CB, DSO, RE (21 October 1868 – 15 January 1951) was a military writer and British Army officer. Swinton is credited with influencing the development and adoption of the tank by the British during the First World War. He is also known for popularising the term "no-mans land". He published several books of non-fiction and fiction including two books under the pseudonym O'le Luk-Oie.