Section I : Martial law -- Military jurisdiction -- Military necessity -- Retaliation - Art. 27.
Art. 27. The law of war can no more wholly dispense with retaliation than can the law of nations, of which it is a branch. Yet civilized nations acknowledge retaliation as the sternest feature of war. A reckless enemy often leaves to his opponent no other means of securing himself against the repetition of barbarous outrage.