The Governor has an Abrams tank in his arsenal now.
One of his henchmen was a tanker who drove it from wherever.
It has a range of 300 miles on a full tank.
What good is a tank that ran out of fuel?...and batteries?
OR- where are they going to get a tanker full of JP-5?
If I had to make a choice, I think I'd rather be with the guys who had a DR., Vet and First Responder (Rick)
who couldn't get even a rudimentary water treatment system going.
Instead of some bloodthirsty killer who showed what he was whit the hostages.