In the Rebel Army, they salute the traditional way, but they also have a variation on the salute that is exclusive to the Rebels. Basically, at the start of the war, the Feds were all but crushing the Rebel forces under the popular but out-gunned Commander Kimball and it was ‘basically suicide’ to join up with her.
Anyone who joined up did so knowing the odds. The story goes, Kimball once saluted a Fed negotiator with her middle and index finger, then cocked her thumb like a gun pointed at her head. Her soliders, being morbid, picked up the gesture and now Rebel squads use the gun-salute as a gesture of both disgust ‘shoot me now’ or solidarity ‘yeah, we might die, but lets do it anyway.’
Vanessa Kimball and her soldiers holding their own against suicidal odds is the foundation of the Rebel Army and why Locus would give pretty much anything to kill her. She’s the beating heart of the rebellion and as long as she’s standing the enemy will keep fighting.