There was a constitutional difference between war in space and war on Earth, and that was for space combat, there was no depth of strategy!
The cosmos might be vast, but in the event of a war, unless there was planet-based building or bases involved, then both sides were fighting with their lives on the line.
Depth of strategy? If your spaceship was blown up, it was impossible for anyone in the spaceship to survive, because lifeforms in space needed spaceships to survive. In other words, war in space was putting everything on the line. The best strategy was to branch out into more fleet units and sequester the public away on safer grounds, but it did not take away from the danger of the situation.