Comment by lrasinen

There's the view that republican Rome's military success was due to their public career path churning out OK military commanders at a steady rate. Not necessarily great, just good enough with a solid understanding of the basics.

The fall of that system then came about when politically ambitious characters started developing more personal and long-term relations with their troops.

I'd say that's an argument for term limits: you want them to get good but not set roots permanently.