Ammianus (xxvii. 12, xxix. 1, xxx. 1, 2) has described the events, without the dates, of the Persian war. Moses of Chorene (Hist. Armen 1 iii. c. 28, p. 261, c. 31, p. 266, c. 35, p. 271) affords some additional facts; but it is extremely difficult to separate truth from fable.