When can a soldier quit their post as stated in General Order 5?

The correct understanding of General Order 5 emphasizes that a soldier must remain at their post until they are properly relieved. This principle reinforces the importance of duty and responsibility within military operations. Proper relief ensures that the position remains covered, maintaining operational integrity and security. This means that a soldier cannot simply leave their post for personal reasons or due to feeling unwell without having someone else take over their responsibilities. This regulation is in place to prevent gaps in security and to uphold the standards of military conduct, which prioritize teamwork and accountability.

The other choices either misinterpret the conditions under which a soldier can leave their post or present scenarios that do not align with military protocol. For instance, quitting due to illness or after completing duties fails to acknowledge the necessity of proper procedure and interdependence among personnel. Similarly, leaving during a commander's absence does not provide justified grounds for abandoning a post, as the expectation remains that arrangements are made to ensure continuous coverage.