a reply from Richard Borg
(RB) First Strike and Ambush is only played against one attacking close combat unit.In the case of a Fighter Swarm, the First Strike and Ambush card is played against just one attacking close combat unit. In the case of a Fighter Swarm a Battle Back must be played against a unit that is attacking in close combat first if any. Other wise when both Fighter Swarm units are attacking at ranged the battle back is against a unit of the battle back player’s choice.
Let's say 3 fighters swarm one enemy unit. And the opponent plays First Strike/Ambush. Does he get to choose which of the 3 units he strikes first?
(RB) Yes
If one of the 3 fighters is eliminated by the first strike, is the entire swarm attack called off, or do the remaining 2 units still combine their attack dice and attack without the unit that just died?
(RB) Yes - I'm presuming the latter option.
Can the defender choose the target of the battle back?
(RB) Yes