A more thorough explanation:

Definition: The JAG Manual, also known as the Manual of the Judge Advocate General, is a directive on military justice issued by the Secretary of the Navy. It contains rules and regulations that apply to both the Navy and the Marine Corps, with minor variations between the two.

Examples: The JAG Manual outlines procedures for military courts, including how to handle evidence, conduct trials, and impose punishments. It also covers topics such as military discipline, investigations, and appeals.

For example, if a Navy sailor is accused of a crime, the JAG Manual would provide guidance on how the case should be handled. The sailor would be entitled to a fair trial, with evidence presented and witnesses called. If found guilty, the JAG Manual would dictate what punishment could be imposed, such as confinement, reduction in rank, or a dishonorable discharge.