249 Philip slain Decius.
251 Decius slain Gallus.
254 Gallus slain {Valerian.
{Gallienus.
258 Postumus proclaimed Emperor in
Britain [V.A. 1]
260 Valerian slain Gallienus.
265 Victorinus associated with
Postumus [V.A. 1]
268 Gallienus slain Tetricus.
269 Tetricus slain Claudius Gothicus.
270 Claudius Gothicus dies Aurelian.
273 (?) Constantius Chlorus marries
Helen, a British lady [V.A. 6]
274 Constantine the Great born at
York [V.A. 6]
275 Aurelian slain Tacitus.
276 Tacitus slain Florianus.
Florianus slain Probus.
277 Vandal prisoners deported to
Britain [V.A. 1]
282 Probus slain Carus.
283 Carus dies Numerian.
284 Numerian dies Carinus.
285 Carinus dies {Diocletian.
{Maximian.
286 Carausius, first "Count of the
Saxon Shore," becomes Emperor
in Britain [V.A. 3]
292 Constantine and Galerius "Caesars"