The Siege at Kyuden Agasha was a Phoenix victory against a Unicorn army which had been laid siege to Kyuden Agasha, one fourth of the total Unicorn's forces. In the late 12th century the Unicorn Clan invaded the Phoenix lands for the slight of exposing the spiritual threat lingering in the Moto blood. In 1200 the remains of the attackers were pinned in the Mountains of Regret, cut off from the main forces, trapped in Treacherous Pass, without permission to encroach on the lands of the Moshi.