Dictionary.net

Martial law is a code established for the government of the army and navy of the United States.

Its principal rules are to be found in the articles of war. (q. v.) The object of this code, or body of regulations is to, maintain that order and discipline, the fundamental principles of which are a due obedience of the several ranks to their proper officers, a subordination of each rank to their superiors, and the subjection of the whole to certain rules of discipline, essential to their acting with the union and energy of an organized body. The violations of this law are to be tried by a court martial. (q. v.)

A military commander has not the power, by declaring a district to be under martial law, to subject all the citizens to that code, and to suspend the operation of the writ of habeas corpus. 3 Mart. (Lo.) 531. Vide Hale's Hist. C. L. 38; 1 Bl. Com. 413; Tytler on Military Law; Ho. on C. M.; M'Arth. on C. M.; Rules and Articles of War, art. 64, et seq; 2 Story, L. U. S. 1000.