 Modern additions include the upright glockenspiel and several brass instruments including trombone and sousaphone, which are often used by military bands.Chinese troops used tàigǔ drums to motivate troops, to help set a marching pace, and to call out orders or announcements.For example, during a war between Qi and Lu in 684 BC, the effect of drum on soldier's morale is employed to change the result of a major battle.