Located inland and to the south of Ōchis, the Arpeneans were spared the widespread collapse which felled their northern neighbors, and were spared the Sasinthēne invaders which took their places. Rather, the early Arpeneans hailed from a number of tribes around modern-day Aalmergrafe and Goscelebe who confederated to stem the expansion of the Talens, who had made it up the Vorad beyond Tarheny. With the exception of the border with the Talens, the Arpenean tribes remained in near disunity until Tanthes pacified Belethion and began to push south. The modern site of Aalmergrafe passed beneath the Tanthene yoke a millennium before Adanōs. Facing a shrinking frontier in the northwest, the Arpenean aristocracy convened at the site of Goscelebe to form a more permanent confederacy.
Tarheny was reconquered over half a millennium of bloody struggle, at last seeing the Talens pushed back across Tiegrafe (Tëgrab to the Talens). The province of Arpenea, around Aalmergrafe, was at last released with the final dissolution of Tanthene power. When Goscelebe waned, Aalmergrafe took its place, bringing Adanism with it. Throughout the late medieval period, the Orthodox Empire of Arpenea exerted regional power. It also founded a seaport on the isle of Daartlaw, whose mercantile riches from ports as far as Ondmar saw it match the capital in influence. In the end, though, a schism in Goscelebe brought the rise of a new Adanist faith, Gosselevian Monism, and the decline of Aalmergrafe’s Arpenean Empire. Unscathed by the slow decline of Panarine, the Kingdom of Daartlaw emerged at the head of the merchant nations of the world, bringing grand designs for the colonization of the newly-discovered eastern continent and the foundation of a world capital to eclipse all capitals at Reineslew, an equatorial island halfway across the sea.