In the context of sentry duties, what is the Eleventh General Order focused on?

The Eleventh General Order is indeed focused on being vigilant at night and challenging persons. This order emphasizes the importance of alertness and the responsibility of sentries to identify and address anyone approaching their area of responsibility. It serves to ensure security and prevent unauthorized access, especially during low visibility conditions typical at night. A sentry must be attentive and proactive in assessing situations, which includes making contact with individuals who may pose a threat or who may not have the proper authorization to be in that area.

While maintaining communication with superiors and reporting suspicious activities are also important aspects of sentry duties, they fall under broader responsibilities and may not specifically encapsulate the essence of the Eleventh General Order. Saluting, while a part of military courtesies, does not pertain specifically to the core duties of vigilance and challenging required by this particular order. Hence, the focus on vigilance and challenges is crucial to effective sentry operations.