The Ballas are a gang featured in Grand Theft Auto V.
They appear to maintain their traditional rivalry with the Grove Street Families, as they can be seen fighting enemies in green clothing during Franklin's character trailer. In the Game Informer article, Rockstar Games have stated that the Ballas are still going strong, but when you ride into their territory they don't automatically attack you unless you pull out a weapon or aim at them. However, they will attack the police if they drive through their neighborhood and this can be used to your advantage.
One of the protagonists, Franklin, is not in friendly terms with the Ballas as he is part of the Grove Street Families.