It also makes sense to not focus on the naval aspects of space flight when you almost never actually fly through space, and almost all your potential theaters of war share a common border (the stargate).

Also ExFor series where the UN's only starship is run by the US Army. But that's more... a consequence of events that lead an infantry soldier to inexplicably be in command of a starship. He even mentions how unusual the whole situation is, and to be in command over actual UN Navy officers. But he remains in command through being the only experienced skipper of a space warship in all of humanity regardless of being in the Army.

He also muses that starships wouldn't be best to be crewed by blue water navy forces, but rather submariners because they too cannot go above deck and are accustomed to long deployments in a tube. A lot of space warfare in that series is sensor evasion and standoff engagements, also like subs.

Haha also has funny lines like "I tossed the ball against the wall. I guess I should call it a bulkhead but I'm in the Army and we call them walls"

True, but it's only because the Stargate program is an Air Force program