What if they live in a gas giant? Or an ocean planet? Or an airless asteroid? Or a Venus-like world? You've got to remember that the concept of war will vary wildly as environments do.
None of those preclude the characteristics that I just layed out.
Just because a certain military asset is a dedicated gas giant vehicle does not preclude it having size, reaction speeds, weapon yields, cruising speeds, and the like.
That, and gas giants, ocean planets, airless asteroids and Venus-like worlds do not necessarily make that attrition capability, optimum and maximum force projection, and so on suddenly become inapplicable concepts. For that matter, even for things as alien as the Flatlanders, such military concepts are still quite relevant.
