Sent three waves of combat ships to fight some Precursors. The first two died. The third had an easier job, since the opposition's missile stores were partially exhausted - just suffered heavy damage to one ship. (Without the first two waves dying, I think I might have lost a ship or two in that third wave. They're 51k ton ships loaded with thirty CIWS, armour and shields, so they're pretty sturdy.)
I tried to save the poor souls of those in the first waves, but was too slow. For one, though, I did remember to put emergency cryo on my combat ships, so that survivors can be saved.