Rebels, Rebels, Everywhere

[Gradenko]

Does anyone know what causes rebels to appear? Is it related to the happiness/weath/culture of a province or just random? More importantly, is there a way to prevent them from spawning in the first place?

[Claudius the God]

has anyone seen a rebel army try to take a city yet? i heard that some might try to do that.
i've had a rebel army in the red outside my city, but they hadn't besieged my city though.

and how does the rebel faction as a whole use the money they make off their own cities and disruptions of factions' trading? do they have the ability to recruit mercenaries anywhere on the map? without a general?

[The Stranger]

has anyone seen a rebel army try to take a city yet? i heard that some might try to do that.
i've had a rebel army in the red outside my city, but they hadn't besieged my city though.

and how does the rebel faction as a whole use the money they make off their own cities and disruptions of factions' trading? do they have the ability to recruit mercenaries anywhere on the map? without a general?

yes i had but they relieved the siege after 2 turns.