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So Aurelian rules for 15 to 20 years, vs 4. He was a reformer and truly brought the empire back together. He conquered the palymerian empire back into the Roman Empire. Did not kill Zenobia but gave her estates in Rome. Conquered the Gallic empire and pardoned its emporor and made him a governor in Rome. He had the army behind him and was a reformer in civic issues.
Could he have reformed and brought the government together for a longer Roman Empire?