At the outset of the American Revolution, United States military units primarily relied on fife and drum corps for musical support. Americans were first introduced to the bugle horn (forerunner to the modern bugle) during the Battle of Harlem Heights, when British infantry used the instrument, causing Joseph Reed to later recall, "the enemy appeared in open view, and sounded their bugles in a most insulting manner, as is usual after a fox chase. I never felt such a sensation before—it seemed to crown our disgrace." Some American cavalry units adopted bugle horns during the war, however, a shortage of brass in the Thirteen Colonies largely limited use of the instrument to the opposing British and German forces, with American troops continuing to rely heavily on fifes, drums, and even – at the Battle of Saratoga – turkey calls. Among the most noted American military musicians during the revolutionary period was Barzillai Lew whose fifing during the bloody Battle of Bunker Hill has been credited with keeping troop morale high.