Conduct of the army and senate after the death of Aurelian. Reigns of Tacitus, Probus, and Carus, and his sons. Extraordinary Contest between the Army and the Senate for the Choice of an Emperor
| AD | Event |
| 275 | Peaceful Interregnum of 8 Months; Consul Assembles Senate; Character of Tacitus, Elected Emperor, accepts the Purple; Authority of Senate; Their Joy and Confidence |
|---|---|
| 276 | Tacitus is acknowledged by the Army; Alani invade Asia, repulsed by Tacitus; Death of Emperor Tacitus; Usurpation & Death of his Brother Florianus, Family Subsists in Obscurity; Character & Elevation of the Emperor Probus; His Respectful Conduct towards the Senate; Victories of Probus over the Barbarians |
| 277 | Delivers Gaul from Invasion by Germans; carries his Arms into Germany; builds a Wall from Rhine to Danube; Introduction & Settlement of Barbarians; Daring Enterprise of the Franks |
| 279 | Revolt of Saturninus in the East |
| 280 | Revolt of Bonosus and Proculus in Gaul |
| 281 | Triumph of the Emperor Probus; His Discipline |
| 282 | His Death; Election and Character of Carus; The Sentiments of the Senate and People; Carus defeats the Sarmatians, and marches into the East |
| 283 | He gives Audience to the Persian Ambassadors; His Victories, and extraordinary Death; He is succeeded by his two Sons, Carinus and Numerian |
| 284 | Vices of Carinus; He celebrates the Roman Games; Spectacles of Rome; The Amphitheatre; Return of Numerian with the Army from Persia; Death of Numerian |
| 284 | Election of the Emperor Diocletian |
| 285 | Defeat and Death of Carinus |