What is the eighth general order of a sentry regarding alarms?

The eighth general order of a sentry is to give the alarm in case of disorder. This order emphasizes the responsibility of the sentry to be vigilant and proactive in ensuring the security of their assigned area. A sentry's duty is not only to observe but also to communicate any disturbances or potential threats to their chain of command. This includes sounding an alarm or alerting fellow personnel if they perceive a situation that could jeopardize safety or security, ensuring that appropriate actions can be taken promptly.

The other choices focus on different responsibilities and orders that are crucial for a sentry but do not pertain specifically to the eighth general order. They outline various aspects of maintaining security and observing protocol, but the essence of the eighth order is centered solely on the act of raising an alarm when disorder occurs.