Nerull, I am afraid your history is indeed a bit long ago and the subject foggy
During the crusades there were three major knights orders: The Templars, the Johannites (spelling in English?) and the Teutonic order. All were a mixture of military formations and health- and pilgrimcare organizations. But their members were NO priests of the catholic church, though they were living mostly according to certain monk rules and principles (chastity, personal poverty, obedience). Some of the members received lower sacraments, but - again - they were not ordained priests.
And the knights and soldiers of the orders were as (lat.) milites christi not subject to a bloodspilling prohibiton (as long as it was infidel's blood) according to medieval church laws. So there was no self restriction to certain weapons (Whatfor? A morning star or warhammer will make as awful a mess as a sword if used professionally).
The knights orders are actually the archetype of the paladin in fantasy games. "First on the battlefield, last to leave" was their motto and their valor, fighting skills, faith, selfrighteousness, pride and stubborness was infamous (at least later on).
There were actually other knights orders, for example during the Spanish reconquista, and though this is not my specialty, I am pretty sure they did not selfrestrict their use of weapons as well. Their principles and ideas were very much the same as in the crusades.