There are under the Constitution three kinds of military jurisdiction: one to be exercised both in peace and war; another to be exercised in time of foreign war without the boundaries of the United States, or in time of rebellion and civil war within States or districts occupied by rebels treated as belligerents; and a third to be exercised in time of invasion or insurrection within the limits of the United States, or during rebellion within the limits of States maintaining adhesion to the National Government, when the public danger requires its exercise. The first of these may be called jurisdiction under military law, and is found in acts of Congress prescribing rules and articles of war, or otherwise providing for the government of the national forces; the second may be distinguished as military government, superseding, as far as may be deemed expedient, the local law, and exercised by the military commander under the direction of the President, with the express or implied sanction of Congress, while the third may be denominated martial law proper, and is called into action by Congress, or temporarily, when the action of Congress cannot be invited, and in the case of justifying or excusing peril, by the President, in times of insurrection or invasion, or of civil or foreign war within districts or localities where ordinary law no longer adequately secures public safety and private rights. We think that the power of Congress in such times and in such localities to authorize trials for crimes against the security and safety of the national forces may be derived from its constitutional authority to raise and support armies and to declare war, if not from its constitutional authority to provide for governing the national forces.[Footnote: _Ex parte_ Milligan, 4 Wallace's Reports, 141.] The Constitution of the United States contains some provisions restricting the jurisdiction of military authorities and tribunals over controversies, which are not found in the Constitutions of the States. It may well be that martial law has for the United States a narrower meaning than it may possess in a particular State.