e.g. (and this is just spitballing so please no attacks) a system where rear bases are locked out and only become active once the enemy breaches a perimeter - say 2 grids.
Would they get re-disabled if the tide turns?
How would that interact with the % fields owned win-the-war logic?
I'm not saying that couldn't work, but it might be simpler to just have some smaller maps.
I used to play a lot of Battlefield. They had a game mode called Operations.
It had a rolling front line that only enabled spawns a short distance either side of the current frontline. Similar to what you are suggesting.
As that section was won, the front line shifted across the map and only spawn points on either side for the front was enabled. at any phase there spawns were limited to those just on either side of the frontline.
The game was won when one side pushed all the way and captured the final sector at one end of the map or the other.
Envision a scrimmage line in American Football.
That worked well with two sides, I can't really envision how it works with 3 sides.
I think it would be simpler to just have a selection of smaller maps with fields 10mi apart. It would require some maps to be made, but it be simpler wouldn't require messing with the win the war logic. And a lot simpler to roll back if it doesn't work. The small maps could simply be removed from rotation and code wouldn't have to change.
