The Roman tuba, or trumpet was a military signal instrument used by the ancient Roman military and in religious rituals. They would signal troop movements such as retreating, attacking, or charging, as well as when guards should mount, sleep, or change posts. Thirty-six or thirty-eight tubicines were assigned to each Roman legion. The tuba would be blown twice each spring in military, governmental, or religious functions. This ceremony was known as the tubilustrium. It was also used in ancient Roman triumphs. It was considered a symbol of war and battle. The instrument was used by the Etruscans in their funerary rituals. It continued to be used in ancient Roman funerary practices.