Which General Order requires a sentry to report violations of orders?

The 3rd General Order is the correct answer because it explicitly instructs a sentry to report all violations of orders they observe. This encompasses any infraction of duty, misconduct, or deviations from established protocols, ensuring that important issues can be addressed by the appropriate authorities. Reporting such violations is crucial for maintaining discipline and security within any military or guarding capacity.

The other general orders focus on different responsibilities. For instance, the 2nd General Order deals with the requirement to walk in a prescribed manner during a watch, while the 4th General Order pertains to the duty of the sentry regarding their post and authority over others. The 5th General Order generally instructs sentries to quit their posts only when properly relieved. Each general order plays a unique role in defining the duties and responsibilities of a sentry, but the reporting of violations is fundamentally covered under the 3rd General Order.