In the BWB, the following is said:

"Civilization maintained some cohesion for a good many years after the strike at Shayol Ghul, of course, though the decline into barbarism was inevitable. But in many ways, the Shadowspawn were a more immediate threat than the maddened male Aes Sedai...With Lews Therin gone, Latra Posae, the former leader of the Fateful Concord, rose to preeminence, earning the name "Shadar Nor", translated as "Cutter of the Shadow" or perhaps "Slicer of the Shadow", for her valiant fight against the Shadowsworn..."

There is a lot of intervening wording about how after the Sealing, the Shadowspawn and the Forsaken increasingly began fighting amongst each other just as often as they fought against the Aes Sedai and the Light's forces, and also how The Breaking that put a finish to the War.