At risk of being nitpicky, Hannibal's reward was probably more in terms of defeating/killing Romans, as his entire life was more or less focused on hatred for R

At risk of being nitpicky, Hannibal's reward was probably more in terms of defeating/killing Romans, as his entire life was more or less focused on hatred for Rome and a wish to destroy it. I only bring this up because rewards can be (and in my opinion the best ones are) immaterial, the type of things that would fit into the self-actualization part of Maslow's hierarchy of needs. I think this type of reward is much more critical than material ones for being able to endure those conditions for a long time.