Ok, finally beat the mission. No, running past the guard towers doesn't work. It's suicide. First trick, don't tell your troops to move long distances. Keep them bunched up together to mass fire. Secondly, move only small distances at a time and make the various GDI positions come to you. Third trick, take out the GDI base FIRST. But make sure you do it without approaching the second set of towers. If you work your way south, then east, then north, you can kick their front door in, take down the base, then go back around for the village and remaining troops, of which there will be very few, because GDI sent reinforcements to the base while you were blowing it to hell.