According to the 11th Order, what should a sentry do at night?

The appropriate action for a sentry at night, according to the 11th Order, is to remain vigilant and challenge all individuals who come near the post. This emphasizes the importance of maintaining security during nighttime hours when visibility is reduced, and potential threats may be more difficult to detect. A sentry's primary role is to observe and provide security, meaning they must be alert to any movements or sounds in their vicinity. Challenging individuals ensures that they can identify whether those approaching are friendly or may pose a risk to the safety of the area they are guarding.

This responsibility is crucial because it safeguards not only the sentry's position but also protects any personnel or resources in the area. Being vigilant means that the sentry stays attentive and aware of their surroundings, ready to respond as needed. Other options, such as relaxing or limiting interactions unnecessarily, do not support the primary objective of vigilance that is critical during night duty.