The Order of the Knights Templar is the military branch of the Church of the Silver Flame. It's a blanket organisation that is made up of many sub-orders, with each one devoted to a particular interpretation of the beliefs of the church, and usually specialised in a particular fighting style, or fighting a particular enemy.
The primary missions of the Knights Templar is to fight against supernatural evil. During the Last War, the Knights Templar within Thrane became the countries primary military force and law enforcement.