RULES QUESTION: Can headquarters be targeted by fighter strikes?
No. Headquarters count as a battlegroup, but not as a ship, and thus they are not targetable with strikes. So you also cannot, for example, play a ‘Ram’ on an HQ, or subject them to the effects of a black hole. Furthermore, HQs are considered battlegroups only for purposes of battlegroup attacks against them. Other actions that target battlegroups cannot be played on an HQ.