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If you mean Bugle, all armies used bugles and still do. For centuries they have been used to rouse the troops (Reveille),sound lights out (Last Post, Taps in Americanese), Pay Call, Food call, Assembly and so on in the days before public address systems. For generations they were used on the battlefield and by Navies at sea with quite complex tunes for cavalry manoeuvres. Confusingly most armies used the same tunes for the same actions.
They did exist on WW1 battlefields but were quite useless because of noise and style of battle and were dispensed with by all but the French and Italians as they were just about impossible to hear and thereby hangs a very interesting military tale.
WW1 was the first and last conflict where the commanders and officers were unable to communicate their orders direct to their men during battle. From classical and medieval times, flags, heliographs and sound instruments were used and the officer's voices could be heard by most of his troops. After WW1 there was radio, but in the Trenchs once a whistle had been blown and the shooting and shelling started no one coud hear a damn thing. http://historum.com/general-history/471 ... mpets.html
„На диявола – хрест, на неприятеля – шабля”.