Military documents are used for a variety of legal purposes. These documents can be used to verify a service member's identity, rank, and service history. They can also be used to prove eligibility for certain benefits, such as veterans' benefits, or to provide evidence in a court of law. Additionally, military documents can be used to establish a service member's legal rights and responsibilities, such as the right to vote or the obligation to pay taxes. Finally, military documents can be used to provide evidence of a service member's honorable discharge from the military.