One great military time travel fiction is 'The Guns of the South' by Harry Turtledove. It involves time - traveling Confederates with AK - 47s. Another is 'Time Patrol' by Poul Anderson which has military - like elements in its time - traveling adventures. And 'Doomsday Book' by Connie Willis also has some military - ish undertones as it deals with time travel and a historical plague situation.
Sure. 'A Connecticut Yankee in King Arthur's Court' by Mark Twain can be considered military time travel fiction to some extent. The main character uses his modern - day knowledge, which includes some military know - how, in the Arthurian era. 'Lest Darkness Fall' by L. Sprague de Camp also has a character using his wits and some military - like thinking in a time - travel scenario to ancient Rome. And 'The Time Machine' by H.G. Wells, while not strictly military, has elements that could be related to military time travel fiction as it shows a future with different species that could potentially be in a military - like struggle.
Well, 'The Anubis Gates' by Tim Powers is a classic military time travel fiction. It weaves together elements of military, magic, and time travel in a really engaging way. There's also 'Pastwatch: The Redemption of Christopher Columbus' by Orson Scott Card where military - like strategies are involved in time - traveling to change history. '1632' by Eric Flint is another good one, with military action in a time - shifted 17th - century Europe.