The history of the National Guard began on December 13, 1636, when the General Court of the Massachusetts Bay Colony ordered the organization of the Colony's militia companies into three regiments: The North, South and East Regiments. The colonists had adopted the English militia system which obligated all males, between the ages of 16 and 60, to possess arms and participate in the defense of the community. The early colonial militia drilled once a week and provided guard details each evening to sound the alarm in case of attack.