Firstly there was no area where you can go through people would be killed the second they went through. Or we could just dig under the laser like we did before. Also, the thing he had prepared for is finally coming in handy. When our troops disappeared, they hid in peoples houses and you never bothered to check.We also have full control of the laser now. Your troops are stuck, you only have 10k now and all supply is stopped because of the laser.