Yes, the war bridle can be used on horses that have been ridden or trained exclusively English or Western. Despite popular belief, the differences between English and Western riding fundamentals are minor- especially from a horse's perspective. As long as your horse is trained to respond to cues from your seat and legs, horses may do well when ridden with a war bridle. When introducing any new tack to your horse, always introduce the item gradually, and give your horse a chance to get used to it without force, intimidation, or excess pressure.