Are these two sentences worded in the best way?

Porthios assisted with the migration of his people from Qualinesti to Southern Ergoth, and while there, the younger elves sided with him while the older elves sided with Solostaran in decisions regarding what to do with the Kagonesti and the Silvanesti. Porthios journeyed with his father to the second meeting of the Whitestone Council in 352 AC, and there he demanded the return of the dragon orb that had been taken from the Qualinesti settlement in Southern Ergoth.