See Full Constitution
Article III

Section 12. Military subordinate to civil power

Standing armies, in time of peace, should be avoided as dangerous to liberty. The military shall be subordinate to the civil power; and no citizen, unless engaged in the military service of the state, shall be tried or punished by any military court, for any offence that is cognizable by the civil courts of the state. No soldier shall, in time of peace, be quartered in any house, without consent of the owner; nor in time of war, except in the manner to be prescribed by law.