This makes negative sense.
Why would you abandon and make useless (to yourself) your territory to defend it? This makes a much sense as coming home from work to find that someone has taken over your home, but instead of dealing with it… you strip down, leave all your stuff inside the house, ask them to lock everything after you leave and then run off to the woods.
Why abandon an established support and logistics network and give it to your enemy?
Any yes, before you state that aggressors never have citadels… we wardec folk, gank, and have citadels.