cornu
It was called the "cornu".
You may be thinking of a bugle, cornu or baccina (most likely a baccina).
The cornu was 3 m (9.8 ft) long in the shape of a letter 'G braced by a crossbar that stiffened it and provided a means of supporting its weight on the player's shoulder. It was used by the army for signalling orders to troops in battle.
Aerophone
cornu
It was called the "cornu".
You may be thinking of a bugle, cornu or baccina (most likely a baccina).
Tuba is the straight trumpet. The curved trumpet used by the military to signal orders, etc. was called a "bucina" and was blown by a bucinator.
the burgomaster received unwelcome orders from the American troops
Orders from the Commander in Chief.
Troops acting under orders of the president.
Operation orders are the official commands given to the troops for their mission. They dictate how things will be carried out and the ultimate goal which must be achieved.
Pickett's orders were to break the union defensive line.
The Texas Army.
The cornu was 3 m (9.8 ft) long in the shape of a letter 'G braced by a crossbar that stiffened it and provided a means of supporting its weight on the player's shoulder. It was used by the army for signalling orders to troops in battle.
Aerophone