Diocletian's bad cabbages

When the Tetrachy that Diocletian engineered predictably degenerated into a squabble for total control, Diocletian's former co-emperor of the West, Maximian, tried to persuade Diocletian to "un-retire" and end the civil war. Diocletian, as the first Emperor to voluntarily abdicate, was enjoying his peace, and famously told Maximian's messenger, "If you could show the cabbage that I planted with my own hands to your emperor, he definitely wouldn’t dare suggest that I replace the peace and happiness of this place with the storms of a never-satisfied greed."

What if it had been a bad year for cabbages, and Diocletian decided to try to salvage the fruits of all of his hard work and regain power?
 
Even if Diocletian's cabbages turned to be bad he wouldnt came back... He was fed up with being the Emperor plus he was frightened by his disease which brought him to the verge of death...
 
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