Arcadius was born in 377/8 CE to Theodosius, who became Emperor in 379 CE. Arcadius received the title Augustus in 383 CE, in order to insure that Theodosius had an heir if he died fighting the Visigoths. Ten years later, in 393 CE his younger brother, Honorius, was given the same title. For the next two years, father and sons ruled the Empire together. The pearl-diademed bust on the obverse is typical of the portraiture produced in Constantinople, and is a common trait for all three rulers. The reverse demonstrates Thessalonican craftsmanship. This detail compounded with the mintmark S M COMOB places the minting of this coin firmly at the mint of Sirmium. The inscription VICTORIA AVGGG(ustorum) A [Victory of our Three Lords] puts the date of this coin sometime between 393 CE and 395 CE, since Theodosius died in 395 CE. After his death the inscriptions are altered to read VICTORIA AVGG(ustorum) [Victory of our Two Lords]. The victory refers to the victory over Eugenius, who is commonly viewed as a puppet emperor produced by the Frankish General Arbogast. Sirmium was a strategic staging point for the fight against Eugenius, meaning this coin was likely used for military expenses. Andrew Moore 2011.