Political map of Europe & the Mediterranean on 22 Sep 296 (Diocletian and the Tetrarchy: Battle of Calleva Atrebatum), showing the following events: Diocletian’s provincial reform; Narseh vs Bahram III; Busiris–Coptos revolt; Siege of Gesoriacum; Constantius’ Frisian Campaign; Allectus; Diocletian’s Third Sarmatian Campaign; Carpian Campaign of 296; Battle of Calleva Atrebatum.