Flavius Claudius Constantinus is known in English as Constantine II was the eldest son of Constantine the Great and Fausta. On March 1, 317, Constantine was made Caesar, and at the age of seven, in 323, took part in his father's campaign against the Sarmatians. At the age of ten he became commander of Gaul, after the death of his half-brother Crispus. An inscription dating to 330 records the title of Alamannicus, so it is probable that his generals won a victory over Alamanni. His military career continued when Constantine I elected his son field commander during the 332 campaign against the Goths. Following the death of his father in 337, Constantine II became emperor jointly with his brothers Constantius II and Constans. After the division of the empire, made by the three brothers in September of the same year in Pannonia, he ruled over Gaul, Britannia and Hispania. He was involved in the struggle between the different Christian streams. The Western portion of the empire leaned towards Trinitarism and against Arianism, and Constantine freed Athanasius and allowed him to return to Alexandria. This action also put some burden on Constantius II, who was a supporter of Arianism. At first, he was the guardian of his younger brother Constans, whose portion was Italia, Africa and Illyricum. As Constans came of age, Constantine would not relinquish the guardianship and in 340 he marched against Constans in Italy, but was defeated at Aquileia and died in battle. Constans came to control his deceased brother's realm.

Main Roman Coin Book and Other References:

RIC = Mattingly, Harold    The Roman Imperial Coinage
BMC = Coins of the Roman Empire in the British Museum
RSC = Seaby, H A    Roman Silver Coinage
RCV = Sear, David R    Roman Coins and Their Values
Cr = Crawford, Michael    The Roman Republican Coinage
SB = Sear, David R    Byzantine Coins and Their Values
S = Coins of England and the United Kingdom
WW = Wildwinds.com (reference & attribution site)