CIVIL WARS OF THE ROMAN EMPIRE.—193-284.
Causes: Contests for the throne among rival generals (barrack emperors).
Result: Reorganization of empire by Diocletian (284-305).
WARS OF CONSTANTINE THE GREAT FOR THE EMPIRE.—310-323.
(1) Constantine vs. (2) Others, Augusti.
Causes: Confusion following abdication of Diocletian.
Leaders: (1) Constantine; (2) Maxentius, Maximinus, Licinius.
Chief Action: (1) Turin.
Results: Constantine becomes sole ruler of Roman empire. He redistricts the empire, moves the capital to Constantinople and recognizes Christianity.
INVASION OF ROMAN EMPIRE BY NORTHERN BARBARIANS—375-493.