The Sun Dogs were a tribe after the Great War.
The Sun Dogs are mentioned in Fallout: New Vegas.
- Courier: "I've slaughtered the enemy at Camp Forlorn Hope."
Dead Sea: " A glorious victory. You must be very satisfied. I'll send word of your achievement. Perhaps Caesar will see fit to send another contubernium to occupy the Camp. Here - take this, my blade. It was a gift from my Centurion upon the defeat of the Sun Dog tribe."
(Dead Sea's dialogue)