Which General Order requires a sentry to observe their surroundings?

The Second General Order emphasizes the importance of observing the surroundings as part of the sentry's duties. This order instructs the sentry to "walk my post in a military manner, keeping always on the alert, and observing everything that takes place within sight or hearing." The core responsibility outlined in this order is to maintain vigilance and awareness of the environment to ensure security. This involves actively monitoring for any suspicious activity or threats, thereby fulfilling the role of a sentry in a security context. By being observant, the sentry can act not only as a deterrent but also as a first line of action in reporting potential security breaches or incidents. The emphasis on observation is crucial in maintaining overall safety and effectiveness in security operations.