In the context of the General Orders of a Sentry, what does "be especially watchful at night" imply?

The phrase "be especially watchful at night" highlights the importance of heightened vigilance during nighttime hours when visibility is significantly reduced. This directive acknowledges that dangers or security threats may be more challenging to detect in low light, making it essential for a sentry to maintain a higher level of alertness and attentiveness. Nighttime conditions can obscure potential risks, such as intruders or other hazards, which necessitates that the individual on duty remains focused and proactive in ensuring safety and security.

This emphasis on vigilance directly relates to the responsibilities of a sentry, who must be consistently engaged and observant, especially when environmental conditions can complicate their ability to perform their duties effectively.