"Aurelius Valerius Valens (died March 1, 317) was Roman Emperor from late 316 to March 1, 317. Valens had previously been dux limitis (duke of the frontier) in Dacia.
In the first civil war between Licinius and Constantine I, the latter won an overwhelming victory at the battle of Cibalae on October 8, 316 (some historians date it in 314). Licinius fled to Adrianople where, with the help of Valens, he gathered a second army. There, early in December 316, he elevated Valens to the rank of Augustus, presumably in order to secure his loyalty. Much later, Licinius would use the same trick (with just as little success) in the second civil war with Constantine, by appointing Martinian co-emperor." - (en.wikipedia.org 11.08.2021)
)