Go to the second to last level in skirmish then use any troop (I usually
use rocket soldier cause there anti-air and look at the end at the
bridges and you will see brush. use a recon, truck, air lift, or
helicopter (I usually use helicopter guarded by ATA fighters because
there fast then get some rangers and put them with the rocket men and
sometimes I give the a helicopter for close air support and a light
armor and you have an invincible force (Almost)