The vast majority of the Orders Militant is made up of Battle Sisters. Every Battle Sister is an orphan raised from birth by the Schola Progenium to believe in the righteousness of their cause. They are the most physically adept and martial members of the Adeptus Sororitas, and they form the mainstay of the Ecclesiarchy's fighting forces. They are trained in the use of arms and armour from an early age, and when combined with their unquenchable faith, they are a force to be reckoned with.