Per Isaac Arthur’s thoughts on the subject, a common tendency I’ve seen in more militant sci-fi is the presence of ground forces. Interstellar navies have obvious uses, but I find it harder to figure out how terrestrial armies would actually work, aside from cases where the factions fielding...
My attempt at creating banners for 18 of the 20 first founding space marine chapters. Inspired by Warhammer 40k artwork from Games Workshop & Forge World Books, Games & Transfer Sheets as well as works from Baka-Design and 40-Kun.
If you like to see larger versions of the individual banners...