Complex sentence: Pistol-whipping should not be confused with buttstroking, a close-combat military discipline, since pistol-whipping is usually not a trained skill and the pistol-whipper may not have lethal intent.
Split into simpler sentences: Pistol-whipping should not be confused with buttstroking, a close-combat military discipline. This is because pistol-whipping is usually not a trained skill and the pistol-whipper may not have lethal intent.