When I started strat 5, it was just me and Dirk, and we were noobs. We conquered New Shulus, but fearing our powerful neighbours we offered vassalage to Acre. And they accepted, and gave us protection, but told us to give New Shulus to Fenris. We complied, knowing they were much more powerful and naively assuming they would crush us.
The point is we attacked an AI fief, and, perhaps foolishly, gave it up. But we did not attack Acre, or the Squids, or G-Force when we were looking for a start (tho we did later, and it was great fun). The point is, you do not attack a big faction and expect to get away with it. The Berserks did. And they didn't.
So, while I obviously admire the 'small starters', we do ask you to use your brains. When you don't have force, use diplomacy. If you attack a larger enemy, they will kill you. To not do so is a sign of weakness.
So, until I hear the berserks formally surrender, I guess we will attack them and send them to Europe on sight. Should they surrender, we won't ask conditions. We will not ask for payments in silver, or insist they give up lands. Just a simple end to war.