What happens to your towers, etc? Do you start from ground zero with each new conquest?
Up to now, the map is different each time.
Of course the level of the fortress facility continues.
If you are talking about your watchtowers (for whatever reason that may be), then the answer is yes, the towers go away and your start with a conquest score of 0. I believe you are talking of the Stronghold buildings (or towers ), though. The answer there is no, your stronghold upgrades do not go back to the ground, but they stay the same. Hope this helps!