Apparently concerned about the alliance between the Christian rulers of Rome and Armenia, Shapur II, shah of Sasanian Persia, sent his general Narseh to invade Armenia in 336. Many Armenians were Zoroastrian or otherwise pro-Persian and welcomed Narseh, who quickly captured the Armenian king Khosrov III the Small and replaced him with a Persian client. At about the same time, Vache I, the Arsacid king of Albania, abandoned the Romans and became a vassal of Shapur.
in wikipedia
In spring 337, shortly after departing New Rome (Constantinople) to begin his war with Persia, Constantine fell ill. At the villa of Achyron, near Nicomedia, he was baptized by the Arian bishop Eusebius of Nicomedia and then died. His body was transferred back to Constantinople, where he was buried in the Church of the Holy Apostles, surrounded by the memorial steles of the Twelve Apostles.
in wikipedia
During the purge following the death of his father Constantine in May 337, the 20-year-old Constantius II seized control of the deposed Dalmatius’ territory in the Balkans. In September his two brothers Constantine II and Constans—in control of Gaul and Italy respectively—met with him in Pannoniae, where all three were proclaimed joint Augusti by the army and part of Constantius’ gains in the Balkans were ceded to Constans. However, as Constans was at the time only about 14, he was initially under the guardianship of the 21-year-old Constantine.
in wikipedia
