If the Hellenistic kingdoms fell one after the other to the Romans, Egypt remained independent and did not become a Roman state until 30 BC.
The Greco-Roman Era in Egypt
The history of Roman Egypt began with the defeat of Egypt in 30 B.C by Octavian (later Emperor Augustus Caesar), after defeating Marcus Antonius and the Ptolemaic Queen Cleopatra VII at the Battle of Actium.
In the aftermath, Egypt became a province of the Roman Empire, and it included most of present-day Egypt except the Sinai Peninsula. Both provinces, Cyrenaica to the West and Arab countries to the east, were bordering Egypt. Egypt played the main producer of grains for the empire.
Egypt Roman Period
The first Roman Emperor was "Augustus" and he issued a special commemorative coin on the occasion of Egypt's annexation of his authority bearing the image of the crocodile, the most famous of the indigo animals. Under it was written the phrase "Aegypto Capta", which means opening Egypt, and Egypt was coveted by the Romans economically. Egypt has a financial reward and a specific tax on wheat and yield that must be shipped to Rome every year; that is, a large part of the Egyptians ’income and agricultural production went to Rome without consideration.
Many rulers succeeded to the throne of Rome from 30 BC. - 396 A.D. From about 300-400 CE, most Egyptians converted to the Coptic religion.