What is the birthday of the Army National Guard? The official birth
date of the Army National Guard as a reserve component of the
Army is December 13, 1636. On this date, the Massachusetts
colonial legislature directed that the colony’s existing militia
companies be organized into three.

When the National Guard’s oldest regiments met for their first drill
on the village green in Salem, Massachusetts, they were barely
three months old, organized on December 13th, 1636, the date
we now celebrate as the National Guard birthday.