I can't get past the 2nd mission, 'First Strike'. I build the 10 missile ships as requested, send them to Abbot where they get destroyed. So I send 24 missile ships next time, same result, send in various mixes of assault and missile frigates, same result. OK, maybe I'm really bad at this game, so play it on easy, again I get decimated.
You have to destroy the mining stations, so they can't build any space ships. That way you can clear out all the enemies and then you can move on to destroying the military base. --- Hatred made me stronger.