A prominent division of the New Armes Kingdom's national army. The name of the division most likely comes from it's prominence on New Armes southern border, with the Falena Queendom, that is comprised of rocky terrain and mountains. In 449, the Armes Southern Mountain Corps agreed to an alliance with the Falenan House of Barows which would see the lands of Barows become a New Armes vassal state, however the plan was foiled by a joint Godwin-Loyalist offensive once the New Armes troops revealed themselves, much to the disgust of Acting Mountain Corps commander, Jidan Guisu.