COUNTER-Guard, or Counter-Guards, in Fortification, are small ramparts with parapets and ditches to cover some part of the body of the place. They are of several shapes, and differently situated; but they are generally formed before the bastions, in order to cover the opposite flanks from being seen from the covert way, and then they consist of two faces making a salient angle, and parallel to the faces of the bastion. They are sometimes constructed before the ravelins.