Didn't happen quickly
There was Crisis in the empire 234-284There were 3 states: Gallic; Palmyrene; Independent RomanDiocletians held the empire together but persecuted Christians. This made it either 'in or out'. After Edict of Milan (constantine) in 313 there were more 'cultural' christians
4th C Decline
Annotations:
What to do with people that recanted their faith
Scars from persecution were badges of honour
Constantinople was established
Visigoths(Germanic Tribe) migrated into the empire. They had Arian leaders so they warred over heresy
Battle of Adrianople (378) where the emperor was killed. This was the end of Pax Romana.
5th C Decline
Annotations:
Vandals invade Gaul, Hispanic and Africa (406AD). They invade Rome 410AD in 410 and 455. The eastern empire continues