What action should a sentry take according to General Order 8?

General Order 8 specifically requires a sentry to sound the alarm in case of fire or disorder. This is critical because it ensures the safety of personnel and property by alerting others to potential danger. Fire and other forms of disorder can escalate quickly, and immediate action is essential to mitigate risks and facilitate a swift response. The duty of a sentry includes maintaining vigilance and being proactive in the protection of their assigned area, which is why taking the initiative to sound an alarm is an integral part of their responsibilities. This action is vital not only for the safety of the sentry but also for everyone in proximity.