Wheel
of Time RPG
This is more of an organisation than a people, dedicated to the preaching of the light against the dark, also to eradicate the dark and darkfriends by any means necessary - most of the time they only have to have a hunch someone is a darkfriend for them to bring the person before the Question (basically torture).
Also known - though not one of their chosen names - as the Whitecloaks due to their usual garb.
They are, by and large, the most widespread military movement in the known lands, owning for all intents and purposes, Amadicia - with a puppet king, the Lord Captain Commander is the actual ruler, or at least was until the arrival of the Seanchan.
Above all they despise Aes Sedai - thinking that they are darkfriends, and that the One power was never meant to be handled in any way by a human.