When each turn starts, if you have an Imperial Officer and a Capital Ship or Fleet in any arena, choose one: One of your Imperials gets Bombard X, where X is half its total power until end of turn. Or: Units can't retreat until end of turn.
Keywords
Bombard
Bombard X: A cumulative, static ability that means, "This unit may attack a unit in the Ground arena instead of the Space arena, using X power plus any other effects." You choose whether to use Bombard to attack a unit in the Ground arena or to make a normal attack in the Space arena. You can't attack a unit in the Space arena using Bombard. Power changes affect Bombard.