Valentinian became emperor after Jovian's death. He was a capable
general and performed admirably on behalf of the empire given the advanced state
of decay it was currently under. To start things off he named his brother Valens
co-emperor and was handed over the east half of the empire. A couple of years
later he named his young son Gratian co-ruler of the West as well in case
anything happened while he was campaigning against the ever-present barbarians.
That something happened in 375 when he suffered a stroke after becoming angry at
a group of barbarian peacemakers (presumably for offering unfavorable terms).
Roman Imperial Valentinian I
AE 1 25 Feb 364-17 Nov 375 A.D.
28.3 mm. 8.13 g.
Nicomedia, Officina 1
Obv. D N VALENTINIANVS P F AVG
Pearl-diademed, draped and cuirassed bust right
Rev. RESTITVTOR REIPVBLICAE
Valentinian standing left, head right, holding labarum (Chi-Rho Christogram) in right and Victory on globe in left, SMNA in exergue