"In honor of our fathers" - "One Khan, One Clan" [Campaign 3, Mission 2]

And also (a little off-topic), I have a bug with the last mission in the campaign for Arantir. Usually, after the dialogue with the ghost of the knight, you get a mission where you have to eliminate the Assassins, but I didn't get it:smile45:. That is, I talked to him, he asked for revenge, but the quest wasn't in the list of tasks, and therefore I couldn't eliminate them(((. But it wasn't that important to me, so I moved on...
So, what should I do:smile45:? I don't understand, is it because of patch 3.1, a game bug, or a virus on my computer:smile15:?

This could be the case if you already eliminated that group of bandits before meeting the ghost of the knight.

Added 5 minutes later
Version 3.0 on Recruit difficulty. I haven't had anyone come or attack me yet; I'm just building the very first Castle in peace. It seems like it's now the second month. But I haven't taken the garrison yet, maybe that's why. Anyway, if it continues like this, I'll slowly gather an army and eliminate everyone myself, haha. And there's another thing: I can't quite decide which type of creatures to take with the Orcs. For example, should I keep the Shamans or take the Daughters of Earth, or some Cyclops? In Heroes 4, Cyclops basically decide everything for the Barbarians, but in Heroes 5, they seem kind of weak...