There is a tendency to think the military comprises dour, unimaginative people of the sort who’d have no use for science fiction, fantasy, or other such frivolous nonsense. A lot of films depict soldiers as robotic, linear thinkers, programmed to follow orders without deviation.
I think most of us know better than that, right? The military has long been home to devotees of speculative fiction. Pick any large military base in the United States, then travel to the nearest town. In addition to the inevitable military supply stores, sewing shops (never short of customers needing new patches sewn on uniforms), tattoo parlors, barbershops, and bars, you will find a well-stocked game store, a comic book shop, and a used bookstore with an excellent selection of science fiction and fantasy.