The strongest castle in Heroes of Might and Magic IV.

It seems to me that each faction has some kind of hidden moral direction. And a player, by trying out different factions, chooses the ONE that suits them best, where they feel comfortable (if the player has established principles in life). Perhaps that's why they defend it, to put it mildly, well, they take offense at the faction as if it were personal.
After all, Necropolis dominates the map, but not everyone chooses to play as it. With DEEP RESPECT FOR NECROMANCERS.