Not only Lensman, but Skylark novels by Doc Smith. In 2nd Stage Lensman and Children of the Lens, Smith describes gigantic space battles and the problems in trying to coordinate them.
I am currently reading Hell Hath No Fury by Weber and someone else. It is essentially a Starfire campaign on land where there are portals instead of Warp Points. It is a first contact situation, between two very different sets of parallel universes...