Opethandria was a small village somewhere around Ravensworth in Eastern Remon. Its people were slaughtered by the Yamatians in a massacre which was part of Yousei Kaizoku's plot to paint Marcus Sarillius as a monster during the Great War and thus prevent Marcus from rallying the people under the banner of the Grand Alliance. This in part led to the forming of the Remon Corps which sided with Kaizoku in the war to avenge the destruction of Opethandria and its people.