Smoking ruins
If war was certain, then draw them in, feign weakness, and extend their logistical infrastructure to it's weakest point.
Then attack.
There are a number of reasons that particular tactic would be very dangerous. Starting with inert projectiles moving at relativistic speeds carefully placed on an intersecting ballistic trajectory with your Homeworld. They wouldn't even have to vbe very large, just real effing fast.
I could go on, but as with most warfare, aggressive offense is usually a better tactic than in-place defenses. You let the enemy get inside your home systems and the war's pretty much over.
What, you don’t “Scream and Leap!”
sorry I just couldn’t help myself