What was the policy of the roman empire regarding religion in its provinces?

Religion in ancient Rome encompasses the ancestral ethnic religion of the city of Rome that the Romans used to define themselves as a people, as well as the adopted religious practices of peoples brought under Roman rule. The Romans thought of themselves as highly religious, and attributed their... Roman religion was thus practical and contractual, based on the principle of

Where is the map ? u can attach it when asking a question btw

Both countries had to aprove annexation.