All I want is the base to have a special radius.
Units and bases already have a radius. Here is a dev video with turned on dev tool, it is an old one. Just watch it and many things will be more clear about the mechanics itself. That is why I think there should be no problem adding in reinforcement raidus or similar to the existing ones.
This is a very good explaining video even if it is a bit outdated. For anyone. Many of existing aspects are shown and explained. Somewhere near the middle you can even see an orc party to form a new fort.
Unfortunately the devs didn’t give out a testing version with enabled console and commands for testing purposes.
Well, I prefer unrelated faction not to join the battle. No one does something which has no gain to them.
The current factions are enemies of each other. And everyone is attacking everyone all the time, unfortunately mostly we do not see it. Usually such conflicts occure at the faction borders. Why wouldn’t an orc band attack the bandits? Same humans in their eyes. Why not the zombies? Easy prey. Etc.. There is always gain. If you see a bandit group fighting an orc group why wouldn’t you jump in assuming they both are too busy with each other and weakened. Same goes for any other faction.
More 3 way battles? How do you enter a 3 way battle? Do you mean the co-op battle where militia and you fight against bandits?
Having militia is still a 2 way battle since you are on the same team as them. You can enter 3 way battles by attacking the enemy that has a different enemy faction unit near by so it will be drawn into the battle. Or join an already ongoing battle between 2 enemy factions. Same goes for human patrools and caravans, you can draw them in even in fort attacks that are near the road.
Easiest way to see this is at the very start, after accepting the quest and gearing up just wait for the settlement to pop out a caravan or depending of the road-hideout position even 2-3 caravans and attack, all of them will be forced to help.