162–165?Chatti and Chauciattack Roman Germania
163Romans expel Parthiansfrom Armenia
163–165Parthia occupies Osroene;expelled by Romans
164?Romans withdrawfrom Antonine Wall
??–Dec 165Romans invade Parthiaand sack Ctesiphon
Dec 165–?? 180?Plague sweepsRoman Empire
166Unsuccessful Romaninvasion of Media
166?Marcus Aureliusmerges threeDacian provinces