Raising the alarm in the Roman camp

[jkaler48]

A guess is that the watch person would shout something like ALARM West Wall or Tower or the name of the gate which would be picked up and related to the commander of the watch who would turn to the duty trumpeter and have him give the signal. One can imagine that the remaining trumpters in the camp would be quickly awakened grab their instruments and repeat the signal. It is likely that each century would have someone on "fire watch" or interior guard duty of some sort.