Never under estimate the power of the people. It would not be easy, I give you that.... but I guarantee that if the people were to go up in arms.... they have a stronger chance of winning then the military. Anger is a powerful ally.
Tell that to the native American, he was extremely resourceful, and was pretty angry about getting stuck in a reservation. How the police and military deal with large scale riots and protests sums it up. Cities require water, electricty and food. The military cuts off the water, electricty and stops food. In a place like LA, how long can you live without these things ?