Emperor Julian (331-363 AD), often known , as Julian the Apostate was one of the most important Emperors in the history of the Later Roman Empire. He was the last non-Christian to rule the vast territories of Rome. Originally a Christian he renounced his faith and began to worship the old polytheistic gods of the Roman and the Greek pantheon. This led to him being called an apostate or one who abandoned his religion by the Christians. Julian wanted to halt the Christianization of the Empire and revoked many of the rights of the Church. The Emperor was an able man, a gifted administrator, and soldier. It seemed that he would change the Roman Empire, but his disastrous invasion of Sassanian Persia was to end all his ambitions. His defeat virtually ensured that Christianity would triumph in the Roman Empire.This article will discuss the reasons for the failure of the Emperor’s invasion of Persia. It will outline how the invasion was overambitious and that a series of poor strategic decisions resulted in the Emperor’s Emperor's defeat and his death.
[[File: Julian One.jpg |200px|thumb|left|A coin with a portrait of Emperor Julian]]