I recently started playing. I decided, as usual, to start with "Humans".
First, I took a fortress underground, then I captured castles from the Sylvan faction. In the middle of the map, angels are standing guard over something. I looked at the map, and it shows that there's a quest there. Even though I have 6 castles and a larger army than they do, I can't gather enough troops to defeat them. There are a lot of them there, around 2000. The same situation is happening with the monster guarding the entrance to the dungeon. There are also a lot of them there. And as a result, I'm at a dead end. I need to go somewhere, but no matter what, I can't gather a decent army to kill them.