Are these sentences worded in the proper way?

The conflict was the ongoing and chaotic war between Szass Tam and the Council of Zulkirs that began in 1375 DR. Over the course of the ten years of fighting, the civil war in Thay had developed into a stalemate with neither side gaining an advantage. By 1385 DR, Szass Tam controlled primarily the northern part of the nation (Gauros, Lapendrar, Surthay, Delhumide, and Thaymount), while the Council controlled the southern (Priador, Eltabbar, Tyraturos, Thazalhar, Pyarados, and the Alaor).