We recognize December 13th as the birthday of the National Guard<span>. ... December 13, 1636, thus marks the </span>beginning<span> of the organized militia, and the birth of the </span>National Guard's<span> ... </span>Soon<span> afterwards, </span>National Guard<span> Army </span>Air Forces<span> units began to be ... At the time when the </span>Air Force<span> was </span>created<span> in September, 1947 i think this is right.</span>
The National Guard was established on December 13th, 1636 and The Air Force National Guard was established September 18th, 1947. There are 311 years in between each other.
