There are two factions in Bless Online, so you can be sure that both factions want to make sure that the other faction no longer exists. The real question is why the two factions are at odds with one another in the first place, and helpfully, the latest post from the developers explains exactly that. In short, it’s not just about territory, it’s about two different styles of governing that are explicitly incompatible with one another.
To sum up a fair amount of lore, the Hieron is the northern order-based faction, while the Union is the southern freedom-based faction. The Union dislikes the social order and rigidity of the Hieron rule, while the Hieron faction likes the social order and rigidity of its own rule (the fact that the Union races tend to be on the bottom of that order is mostly icing). Of course, there’s more to it than that, so you may wish to read up more to understand exactly why your faction wants the other faction dead.
