If a mercenary participates of an invansion landing on a system that contains multiple planets..can the mercenary attack as part of the landing invasion on all the planets or just one single planet? of yes or no can you pls show reference since i cant found it on the faqs nor rules?
3D board game prints: www.3dhubs.com/service/3dgaming
Invasion, even with multiple planets is done simultaneously. It would be impossible for the mercenary to participate in more then one planetary invasion as they are done at the same time. While you may roll each combat separately it is still one invasion for that activation just done simultaneously. Pick which planet the mercenary will be going down onto and that is the one he will be invading with the other ground forces.
Definitely only one planet, in the same way a single Ground Force can only invade a single planet.
There is nothing else to suggest anything can participate in multiple planetary landings. What is there to suggest anything different for mercenaries? Even the bombard ability of DNs and WS can only be applied to a single planet per ship.