Krall
Banned
I'm getting the feeling that you have lied...
Lying, joking, it's all the same thing.
EDIT: I'd also like to make a comment concerning Terra Panthera, but large nations in general: it would be generally very difficult if not impossible to maintain control of the most inland areas you claimed without control of the Amazon basis, since traveling over land in such a heavily forested region is nigh impossible, with diseases and predators likely to take a very heavy toll. I'd say the most likely border for your country would be the Paraná.
minifidel raises a good point.