Veterans Day honors all those who served in any branch of the military. It was originally conceived as Armistice Day and was first celebrated on November 11, 1919. The significance of the date is that it was the day that the armistice was declared effectively ending World War One.
I never served in the military but my dad and my Uncle George served in the Army while my Uncle John and Uncle B served in the Navy during WWII.
I have many friends in gun rights community who are veterans and I salute them for never forgetting the oath that they took to support and defend the Constitution against all enemies, foreign and domestic.