When the battle phase ends, if none of your units were discarded this turn, X of your Resistance units each gets the Rebel subtype and +1 health until end of game, and each also gets Resilience 1 until end of next turn.
Keywords
Resilience
Resilience X: A cumulative, static ability that means, "As long as this unit has at least X damage counters on it, it gets +X power."