The Witchfinder Army is an organization which is now made up of only two members; Sergeant Shadwell and Private Newton Pulsifer. The Army is paid for by both the angel Aziraphale and his opposite number Crowley, but that's still not very much at all.
About the only thing the Witchfinder Army ever accomplished in its post-Restoration heyday (excluding sterling work put in two centuries later by R.S.M. Nurker to make the Empire safe for missionaries) was the burning at the stake of one Agnes Nutter. This was done by Newton Pulsifer's multi-great-grandfather, Major Thou-Shalt-Not-Commit-Adultery Pulsifer, who was rather satisfied with himself until the gunpowder was lit and the nails came flying out.