What does the eleventh order to the sentry require regarding vigilance?

The eleventh order to the sentry emphasizes the necessity of heightened vigilance, particularly during nighttime and when engaging in the process of challenging. This order requires that a sentry be especially watchful during vulnerable periods and demands that any individual near the post is challenged appropriately. The focus on allowing no one to pass without proper authority underlines the responsibility a sentry has in maintaining security and control over their designated area. This reflects not only an awareness of immediate surroundings but also a proactive approach to ensuring only authorized personnel can access sensitive or secure areas. Thus, this response encapsulates the core elements of the eleventh order of the sentry, highlighting the importance of vigilance in upholding military standards of security and safety.