Is this paragraph correctly worded?

FYI- Nymia and Milsantos are the tharchions, and Szass Tam is the lich. Since Szass Tam had failed to persuade the other zulkirs to elect him regent, Aoth and his comrades were not certain of the lich’s current aims or if they could trust the necromancers in the army preparing to assault the Keep of Thazar. In order to learn the truth, Aoth, Bareris, Chathi, and Mirror decided to interrogate one of the Red Wizards, Urhur Hahpet. After the four defeated Urhur’s undead guards and incapacitated the mage, he confirmed their deductions but was killed by Szass Tam’s binding enchantment before he could reveal the necromancers’ orders concerning the imminent fight against the undead host. Afterward, Nymia and Milsantos decided to imprison the Red Wizards of Necromancy and destroy their undead servants in order to protect the legions from betrayal, and the griffon riders and the clerics of Kossuth helped the tharchions’ troops complete that task.