Formation and backgroundEdit
Little is known about the Blackjacks' formation, except that they were founded sometime before July 12, 1979. They were on the Gramercy Riffs' network.
When Cyrus and the Gramercy Riffs called a conclave of New York City's gang, nine delegates of the Blackjacks were sent to the meeting on behalf of the gang. At the meeting in Van Cortlandt Park, the Bronx; it is unknown what became of the gang's delegates when Cyrus was shot and the meeting was interrupted by the cops.
In The FilmEdit
They attended Cyrus' big meeting.
In The GameEdit
It's possible they were in that large cutscene at the big meeting.