OK - now that I'm on the Stranded mission (snowy mountains, not much Ag), I take it all back. This mission is kicking my butt. Since the Ag is limited and I need to build so many missile towers and laser turrets, I have to either throw everything into tanks/quadwalkers or soldiers. So far, I don't get too far with either one. Any time I get a decent sized group of attackers together to try to take out a turret, they end up getting spanked by a horde of planes and tanks, which then proceed to mow down my base. Then there's not enough Argentum around to make a second try. Oh well, I'll work it out eventually.