The Old World is a dangerous place. With the Empire fractured within and threatened by enemies without, it is only wise to learn the skills of a soldier, or to employ those who already have. Some may say that to live by the sword is to die by the sword, and there is truth to this. But in the wilds of the Empire, to refuse to live by the sword is to die by the sword even sooner. Up in Arms provides options and guidance for Warhammer Fantasy Roleplay Characters who follow warrior careers. It focuses on abilities that players and GMs can make use of to add variety and expertise to the fighting folk of the Old World.