Big empire war issues
I was surprised that when your empire is really big your neighbors can directly attack your vassals.
Fucking Thranduil non-stop attacks my vassals of Grey Mountains and Iron hills. I play for Thorin of We Erebor.
How can I prevent it without burning Thrandul's realm and creating powerful vassals?
I had same problem in Aragorn's compaign. Sauron and Witch king non-stop attacked Ithilen pushing me from decision to destroy Mordor.
Are there any submods of solving this problem?