Well, of the new army I've managed to get one squad fully functional. A 10 man squad with a flamer. The sgt is about 5 years old at a guess, with base armaments. I've made them the 6th Tactical Squad with a stylized six on their right shoulder. That shoulder pad is red with gold trim to visibly differentiate them from the other squads, while the rest of their armor and colors are standard for the rest of the Chorus.
I obtained so many HQ units with this army that my non-unique units may occasionally get used as a really beautiful Company Veterans Squad from time to time just so they don't go to waste. They'll probably all get painted by the end of next week.