Basically, I want to know your opinions on what could've happened had Constantine the Great lived long enough to go on his 'crusade' into Sassanid Persia (we assume he lives long enough to see the entire campaign... but also assuming it won't take any longer then ten or so years), complete with baptism in the Jordan and church shaped tents. How would he have done, and what would the effects be on Christianity and the Empire, with such a large (and Christian) expedition? Could it succeed, and if so, how long could Rome keep its supposed conquests after Constantine's death?