What is an example of military law?

Military law, the body of law concerned with the maintenance of discipline in the armed forces.

Every state requires a code of laws and regulations for the raising, maintenance, and administration of its armed forces, all of which may be considered the field of military law. The term, however, is generally confined to disciplinary military law as defined above-i. e., that part of the code that aims at and sanctions the maintenance of discipline in the armed forces. In the past this was also known by the name of martial law, a term that now has the meaning of military enforcement of order upon a civil population either in occupied territory or in time of disorder.