Imperio galo
After the Macriani were defeated and the Danubian garrison forces who had supported them were pacified, Aureolus accompanied the Emperor in (another?) attempt to crush Postumus and his Gallic Empire. It may have been as a result of this campaign that the province of Raetia was recovered from the Gallic Empire (which had driven out the Juthungi where Gallienus seems to have failed) and Postumus's inscription on the Augsburg Altar was erased. However, Postumus managed to evade complete defeat thanks to the supposed 'carelessness' of Aureolus. It is implied in sources that even at this stage Aureolus was willing to see Gallienus displaced as Emperor and that he deliberately allowed the Gallic usurper to evade destruction.