So basically, Red Hulk walks up and offers me membership in a team named after my favorite kind of Mountain Dew... What's a guy to do...
As far as I can tell, the only membership requirements were a red costume, Me, Red Hulk, Red She-Hulk, Crimson Dynamo, Elektra, Thundra, and Punisher sporting a Red Skulled T-Shirt... Venom is rocking a red spider now too, he wishes he was one of us back in the day! Anyways, long story short, we were going to kill my BFF's girl Domino, sorry Dom, just business.
Due to Domino learning undisclosed government secrets (namely that General Ross was Red Hulk) General Ross assembled a team to silence her, by ending her life. The team Code Red became enemies of X-Force during their short existence.
Note: Most of Code Red later went on to become the Thunderbolts.