Zombies are generally represented as dimwitted and slow moving, making them (in this form) easy to eradicate. Even in mass numbers you could just sit in a tank and blast some loud music so they surround it then just run em all over, set em on fire and repeat. A few military personal with some big guns and lots of ammo could literally mow down millions of them, just sit out in the open on top of a hill and go nuts until either they get too close or they run out of ammo then just hope in a helicopter and regroup. Zombie movies tick me off to no end cause a stupid predictable foe would be easy to beat, if you don't die in the first outbreak then you shouldn't really die. Just get a truck, weld some bars over the windows so they cant just bust through the glass then you're safe and can just run em down at will.