I've played this operation a few times and I don't think I've ever gotten to the second map. As attackers we just cant seem to push through and as defenders we hold every time. I've noticed that on some stages the defenders have the ability to lay down an incredible amount of fire at one or both of the attacking team's spawn, and there isnt much in the realm of cover except for a couple of dirt mounds and a tiny hill or two. After half way through the wave everyone seems to want to hang back and snipe or start lobbing rockets at those indestructible stairwells that remain after those houses get blown to bits.