Here is my attempt at a full description of controlling territories all in one place. This is my attempt at getting everything while being a simple as possible. Any redundancy is for the sake of absolute clarity. If anyone has the time to let me know what I am missing or what is a mistake i’d appreciate it. Note that there might be a couple things on there that haven’t been confirmed yet.
Controlling Territories:
1. If at least 1 unit from each side remains in a territory, it remains contested.
2. If all units from one side are destroyed in battle, the territory becomes controlled.
A. If the attacker has at least 1 unit left, it takes control, unless the territory originally belonged to an ally whose capital is contested or held by the attacker’s side, in which case that ally takes control of its original territory.
B. If the attacker and the defender(s) lost all units, but an ally of the attacker has units there, one such ally takes control, unless the territory originally belonged to an ally whose capital is contested or held by the attacker’s side, in which case that ally takes control of its original territory.
C. If the attacker loses all units and the defender remains, the defending side takes control.
i. If the territory (from which the defenders cleared all attackers) was originally neutral, originally controlled by a minor power, or originally enemy to the defender(s), one power defending that has at least one unit remaining takes control.
ii. If the territory (from which the defenders cleared all attackers) originally belonged to a power on the side of the defender, the original owner takes control.
D. If there are no units left on either side, the original owner takes control.
3. If one side moves all units out of a contested territory, the side with units remaining takes control.
A. If the territory originally belonged to a power on the side that has units remaining, the original power takes control.
B. If the territory was originally neutral, originally controlled by a minor power, or originally enemy to the side with the units remaining, one power that has at least one unit remaining there takes control.
4. If a power regains control of its capital, any territories originally belonging to that power that are controlled by an ally of that power return to the control of the original owner.