What Constantine likely saw.

[Minimalist]

Of course, it could ( and most likely is ) bullshit from the word "go."

The account of the miraculous "sign" appears in Eusebius' Life of Constantine which was not published until after Constantine's death.  Why is that important?

Because Lactantius', who may well have been with Constantine at the Milvian Bridge while Eusebius was still jerking off in Caesarea, makes no mention of any "sign in the sky seen by the army."

Despite their differences in recounting the events leading up to the battle of the Milvian Bridge – Eusebius tells of a divine encounter, in which Constantine and his entire army see a vision sent by the Christian god in the sky, an episode which is entirely absent from Lactantius’ previously written account –

https://cliojournal.wikispaces.com/On+th...ristianity

Would xtian propagandists make up phony shit?  Damn right they would.