The Defence of Duffers Drift is a fictional account of a young, inexperienced British officer, who is tasked with holding a river crossing with 50 troops against a larger enemy force. His initial failures and eventual victory serve as an entertaining and instructive vehicle to convey the principles of small unit tactics. Because it deals with principles, this definitive work has endured to this day and is still on some of the required reading lists of the U.S. Army and Marine Corps. (Goodreads)

Major-General Sir Ernest Dunlop Swinton, KBE, CB, DSO (21 October 1868 15 January 1951) was a British Army officer who played a part in the development and adoption of the tank during the First World War. He was also a war correspondent and author of several allegorical works of fiction on military themes, including a lastingly influential book on tactics and good practice. He is credited, along with fellow officer Lieutenant-Colonel Walter Dally Jones, with having initiated the use of the word "tank" as a code-name for the first tracked, armoured fighting vehicles. (Wikipedia)