Political map of Europe & the Mediterranean 16 March 180 (Second Marcomannic War): After Avidius Cassius’ revolt (175), Marcus Aurelius secured the succession of his 15-year-old son Commodus by making him co-emperor. When, in 177, the Quadi and Marcomanni rose up again (Second Marcomannic War), both co-emperors traveled north to suppress them. Marcus intended to annex the conquered territories as the new province of Marcomannia, but died in 180, just before his vision could come to fruition.