In short, the Commander could have been present on the first night. The fact that he wasn't there on the second night means either that he failed to break through the enemy defense on the first night, and the dwarves decided not to risk it, or that the Commander was still stuck in the castle by that time. There's also a completely crazy option, but I'd rather not mention it for now.
Знание некоторых закономерностей освобождает от изучения многих фактов.
Мечты сбываются рано или поздно, так или иначе.