The Higheast Rebellion is a war in which southern Harmonian forces, working with Highland loyalists in the Higheast Province, led an invasion of the area in order to reclaim the land which had once belonged to Harmonia over 200 years ago and which they had in fact gifted to the first King of Highland, Maroux Blight. Harmonian troops entered the region as the Dunan Army, assisted by several former Allied Army officers engaged them within the region.