The Principality of Mersdon is a sovereign state on a large island approximately 500 km to the east of the Tierran coast. It is is heavily populated and generally used as midpoint station for trade between M'hidiyos and Tierra. It is also the headquarters of the Convocation of the Orders Militant, the gathering of the Grandmasters of the Orders-Militant It is here that matters of faith are determined, inside the Hall of Swords. Only on Mersdon can the convocation legally meet or pass any binding resolutions and as a result, the militarily weak principality is universally respected as neutral ground.