Explanation: During the Roman Republic and Early Empire, a strong sense of civic participation fueled the loyalty of the Roman Legions, making them willing to endure significant losses for relatively little reward in service to a Res Publica they felt they were meaningfully a part of.

However, by the Crisis of the Third Century, much of the civic participation (and basic rights) of the Roman people had been stripped by an increasingly autocratic imperial government, and the military - along with the breakdown of almost all basic government institutions of the period - became increasingly prone to extortion and revolt against the central government.