Doma resists the Gestahlian Empire, and thus is on the brink of invasion. An army of Imperial troops attacks Doma Castle, but Cyan defeats the Imperial commander, sending the Imperial force fleeing, and Doma ends up playing a waiting game.
Kefka, using General Leo's forced leave of absence to his advantage, poisons the river supplying Doma's water, killing most of the inhabitants as well as various Imperial personnel held captive by Doma. Celes knew about the plan, and it is implied she was imprisoned due to speaking out against it. Cyan and a single Doma soldier are the only survivors and Doma continues to be occupied by the Empire for some time, until the fall of the Imperial capital Vector when Emperor Gestahl orders the troops stationed at Doma to withdraw.
A year later, if Cyan returns to the Doma Castle his pain over the destruction will reach critical mass, and the party must enter his Dreamscape, a reflection of Cyan's soul that leads to a phantom version of Doma Castle. The party defeats Wrexsoul here, and Cyan's mind is resolved of his guilt and self-doubt, allowing him to attain his peak level of skill and giving him access to all his Bushido techniques.