This might help:
https://www.abtryassoc.org/misc_pages/redlegs.html
I guess old traditions die hard, we still call other Artillerymen "Redlegs", and remind other disciplines that we are the King of Battle.
Redleg is also a little more acceptable then the other nicknames for my old job, like Fister, or the eyes of death.
Regardless, I really like the howitzer.