Athanasius received his philosophical and theological training at Alexandria. ... When both parties met the emperor Constantine at Constantinople in 336, Athanasius was accused of threatening to interfere with the grain supply from Egypt, and without any formal trial Constantine exiled him to the Rhineland.
What was Athanasius argument?
Athanasius advocates the consubstantiality of the three persons of the trinity which was crucial argument to defend the divinity of Christ. Consequently Athanasius had built the ground of the Trinitarian and Christological doctrine which together with the humanity of Christ represents the complete Trinitarian theology.
Where was Arius exiled?
On June 19, 325, council and emperor issued a circular to the churches in and around Alexandria: Arius and two of his unyielding partisans (Theonas and Secundus) were deposed and exiled to Illyricum, while three other supporters—Theognis of Nicaea, Eusebius of Nicomedia and Maris of Chalcedon—affixed their signatures ...