Which order requires the sentry to pass on all orders received?

The order that requires the sentry to pass on all orders received is known as the Sixth Order. This order emphasizes the importance of communication and following commands in a military environment. When a sentry receives orders, it is crucial that these are passed along quickly and accurately to ensure that everyone involved is informed and can act accordingly. This reflects the principle of maintaining continuous situational awareness and effective command structure, which is vital for operational integrity.

In contrast, the Fifth Order relates to the specific responsibilities regarding the security of the post, the Third Order pertains to being alert and observing for anything unusual, and the Tenth Order involves reporting all violations of orders. Each of these orders serves different purposes within military protocol, making the Sixth Order distinct in its focus on communication.