In the 18th century, each regiment in the British Army maintained its own military band. Until 1749 bandsmen were civilians hired at the expense of the colonel commanding a regiment. Subsequently, they became regular enlisted men who accompanied the unit on active service to provide morale enhancing music on the battlefield or, from the late nineteenth century on, to act as stretcher bearers. Instruments during the 18th century included fifes, drums, the oboe (hautbois), French horn, clarinet and bassoon. Drummers summoned men from their farms and ranches to muster for duty. In the chaotic environment of the battlefield, musical instruments were the only means of commanding the men to advance, stand or retire. In the mid 19th century each smaller unit had their own fifer and drummer, who sounded the daily routine. When units massed for battle a band of musicians was formed for the whole.