Expanding the Star Shattering Sect during the war was far easier than Elder Song and the rest of the elders had expected, as they pretty much encountered no resistance from the local forces who were more than willing to go under a powerful sect that had the backing of two experts in the Soul Ascension Realm.
Even though the same could not be said for the territory under the control of the Onyx, given that the Onyx Empire didn't want to fall out with the Star Shattering Sect, the expansion of the Star Shattering Sect in that place didn't encounter that much more resistance compared to the other region that the Star Shattering Sect was expanding into.