The Second Great War of Unification refers to the period roughly 100 years after the founding of Gatia, during the Reign of Orwen Akana, Fifth Emperor of Cirsova, during which Paelnor and Karkuras were added to the Imperial Dominion.
Late in the Reign of Orwen Akana’s father, the hostile Kingdom of Sabrio sought to expand their domains, challenging the young kingdoms that had taken seed in the future provinces of Karkuras and Paelnor. The nomadic horsemen of Karkuras, find their ranges threatened, both fought against the incurring Paelnorans, and moved their roaming grounds north, into southern Cirsova, and west, into the more settled parts of Karkuras.
Cirsova responded first by building up Daaln and Skitis to act as a ‘borderwatch’ against the encroachment from Karkuras. Orwen Akana raised the imperial legions and marched south. The Emperor quickly realized that the problem lay further south, not with the horsemen, but with those who had attacked and threatened to displace them. The Prince of Athdaelda sent word to the Cirsovans that he was willing to commit arms against the neighboring horsemen, if the Emperor could but aid him in his defense against the expanding Kingdom of Sabrio.
Orwen Akana agreed and managed to travel quickly by the old roads from Skitis to the Orshiano valley. In Korsha, he raised a great fleet, which landed at the mouth of the Sabrio River (the eventual site of Diirdec). As he lead a force of marines up the Sabrio valley, the southern legions pushed back against the nomadic horsemen before joining with the Prince’s standing armies. The horsemen were eventually contained to the eastern plains against the Legion to the north, Athdaelda to the west, the Sabrio river (and the Emperor’s marine force) to the south, and the Dawnsea to the east. The flotilla from Korsha eventually laid waste to the entire kingdom of Sabrio, of which nothing remains today.
Almost a decade of relentless campaigning utterly destroyed Cirsova’s first true rival to primacy, secured the alliance by marriage to the most powerful surviving state (which would eventually become the Seat of the newly annexed province of Karkuras), established a new port from which the Empire could exert naval dominance of the Dawnsea, and so cowed the princes of Kieab and Xeln, that both abdicated their seats, lest they face the fate of the Kingdom of Sabrio. In time, the empire would be able to appoint autocrats to oversee the full annexation of Paelnor. The events of the Second Great War of Unification would ultimately double the size of the Cirsovan Empire by adding her first two provinces and secure Orwen Akana’s divinity in the eyes of the people, lesser only to the majestic Ga Akana.