This might be covered in the rules, but I’ve been having trouble finding a definite answer.

This might be covered in the rules, but I’ve been having trouble finding a definite answer.

This might be covered in the rules, but I’ve been having trouble finding a definite answer. If the players are fighting against a larger group or gang, does the gang itself make “attacks” against the players? does each individual member roll or is it decided by a single group roll? Do the NPCs actually take actions against the PCs at all, or are their actions simply covered by complications and harm as a result of the PCs rolls?