He held direct dominion over the government of Armenia and Pontus. While he was marching to war against Shapur II, king of the Persians, who wished to invade those provinces, he learned of the death of Constantine (337) and suspended the expedition; soon after, in the massacres that occurred in Constantinople, he was killed together with other relatives of the deceased emperor.
BIBL.: J. Burckhardt, Das Zeitalter Constantins des Grossen, new ed., Stuttgart 1920; A. Olivetti, Sulle stragi di Costantinopoli del 337, in Rivista di Filologia, 43 (1915), p. 67. Paolo Brezzi