Are these two sentences worded in the best way?

FYI- Zulkirs are the mage-lords. A week later, the Council of Zulkirs’ fleet arrived in Escalant in the Wizard’s Reach and the mage-lords began to establish the region as their new dominion. Shortly after the refugees’ arrival, Bareris told Aoth that he and Mirror had decided to return to Thay to resume opposing Szass Tam and his followers.