What must a sentry do especially at night according to the Eleventh Order of the Sentry?

The Eleventh Order of the Sentry emphasizes the importance of vigilance and security during nighttime operations. Challenging all persons near the post is critical to ensuring that only authorized individuals are allowed entry and that potential threats are identified early on. At night, visibility is often reduced, making it more challenging to discern the identity and intentions of individuals approaching the post. By actively challenging individuals, a sentry is following protocol to maintain safety, protect sensitive areas, and ensure the integrity of the operation.

The other options, while relevant to security and awareness, do not capture the specific directive outlined in the Eleventh Order. For instance, ensuring the area is well-lit could be helpful, but the primary responsibility focuses on engagement with approaching individuals. Notifying others of their presence and remaining silent are also tactics that may be used in different contexts, but they do not reflect the main duty emphasized in this order. The core action remains the challenge, which directly relates to the role of a sentry in maintaining security and vigilance.