[Taqwus]

Minimally -- disbanded troops should have a chance of increasing unrest proportional to existing unrest and distance from home, and inversely proportional to the rest of the garrison.

You don't suddenly employ a band of soldiers far from home, where banditry and so forth is rife, and without other soldiers to keep them in line, during a war, and expect everything to be hunky-dory. That's the sort of thing that contributes to brigandage if not outright rebellion.