You need to complete this type of rebel op, if you want to unlock rebel support skill Guns for Hire or upgrade its power and cooldown.
Guns for Hire
Call for rebel fighters to temporally join you and add more firepower to your squad.
Power 1: Request a small group of rebels to fight alongside you.
Power 2: Request a large group of rebels to fight alongside you.
Power 3: Request the largest group of rebels to fight alongside you.
