Mass. Const. pt. 2, ch. II, § I, art. VII

[The governor of this commonwealth for the time being, shall be the commander in chief of the army and navy, and of all the military forces of the state, by sea and land, and shall have full power by himself, or by any commander, or other officer or officers, from time to time, to train, instruct, exercise and govern the militia and navy; and, for the special defence and safety of the commonwealth, to assemble in martial array, and put in warlike posture, the inhabitants thereof, and to lead and conduct them, and with them to encounter, repel, resist, expel and pursue, by force of arms, as well by sea as by land, within or without the limits of this commonwealth, and also to kill, slay and destroy, if necessary, and conquer, by all fitting ways, enterprises, and means whatsoever, all and every such person and persons as shall, at any time hereafter, in a hostile manner, attempt or enterprise the destruction, invasion, detriment, or annoyance of this commonwealth; and to use and exercise, over the army and navy, and over the militia in actual service, the law martial, in time of war or invasion, and also in time of rebellion, declared by the legislature to exist, as occasion shall necessarily require; and to take and surprise by all ways and means whatsoever, all and every such person or persons, with their ships, arms, ammunition and other goods, as shall, in a hostile manner, invade, or attempt the invading, conquering, or annoying this commonwealth; and that the governor be intrusted with all these and other powers, incident to the offices of captain-general and commander in chief, and admiral, to be exercised agreeably to the rules and regulations of the constitution, and the laws of the land, and not otherwise.

Provided, that the said governor shall not, at any time hereafter, by virtue of any power by this constitution granted, or hereafter to be granted to him by the legislature, transport any of the inhabitants of this commonwealth, or oblige them to march out of the limits of the same, without their free and voluntary consent, or the consent of the general court; except so far as may be necessary to march or transport them by land or water, for the defence of such part of the state, to which they cannot otherwise conveniently have access.]