Valentinian's Promotion to the Eastern Legions

In 359-360, the Valentinian was promoted to the eastern legions. As a Christian, in a time when that was suddenly a bad thing again, Valentinian's future was very much in doubt. But as Julian was building up his war machine to go invade Persia, he recalled Valentinian to service. His reward for being such a good officer was that he got to witness first-hand the utter meltdown of the Eastern invasion and Julian's subsequent death.