10-15K of them wore red bandannas around their necks to show which side they were on.
I've done a little research into the etymology of the term and found that the earliest use of it was with the Scot-Irish wearing the red bandanna around their neck during the Scots-English Civil Wars.
They are descendants of the clans depicted in the movie Braveheart.
Also the term "hillbilly" has a similar etymology. Derived from a group dubbed the "Billy Boys" from northern Scotland who also fought the English.
They were all fiercely independent and valued freedom and honor. "Hillbilly" and "Redneck" have a common heritage.
Proud Redneck.