What must a sentry do according to the 6th General Order?

The correct answer emphasizes the responsibilities of a sentry, specifically focusing on their duty to receive, obey, and pass on orders from designated officers. This is crucial for maintaining the chain of command and ensuring that orders are followed appropriately. The sentry plays a pivotal role in the security and operational effectiveness of a military unit, and adhering to this directive guarantees that communication is streamlined and that orders are executed without error or confusion.

In the context of military operations, the sentry acts as both a protector and a communicator. By fulfilling this role, the sentry ensures the safety and integrity of their post while coordinating effectively with superior officers. This duty is fundamental to the functioning of military discipline, where clear communication and adherence to commands are paramount for mission success and maintaining order within the ranks.