I have been talking on IRC with SDM about figuring this out.
Basically, there are three fighter wings. They all must be killed. They all arrive individually, and will depart after a period of time. If they depart, you fail.
Currently, the objective I have doesn't work as it should. It worked once, and I thought it was clear, but I was wrong.
To elaborate, it "Worked" by failing, as it should have, when the third fighter wing departed without being killed, though the first two were killed successfully.
On another run through, the very first fighter wing escaped. Though, nothing happened. The objective did not fail.
Currently though, the objective does complete if all the fighter wings are destroyed. I have attached the goal. The very last string is cut off, it reads simply:
0
Steel
Brass
Iron
Any ideas?
[attachment deleted by ninja]