March music originates from the military, and marches are usually played by a marching band. The most important instruments are various drums (especially snare drum), horns, fife or woodwind instruments and brass instruments. Marches and marching bands have even today a strong connection to military, both to drill and parades. Marches, which are played at paces with multiples of normal heartbeat, can have a hypnotic effect on the marching soldiers, rendering them into a trance, This effect was widely known already in the 16th century, and was employed to lead the soldiers in closed ranks against the enemy fire in the 16th and 17th century wars.