What historical periods did ancient Rome go through? When did each historical period begin?

1. In the 6th century BC, the ancient Roman slave state was established with the city of Rome as the center. 2. In 509 BC, Rome became a peaceful country. 3. From the 5th century BC to the 3rd century BC, Rome conquered the Italian peninsula and competed with Carthage for a long time. 4. In the 2nd century BC, Rome became the overlord of the Mediterranean region. 5. In 27 BC, Rome entered the imperial period. 6. In the 1st century AD, the Roman Empire continued to expand. 7. In the 2nd century AD , the empire’s territory was determined 8. The empire declined in the 3rd century AD 9. In 395 AD, the empire split into the Eastern and Western Roman Empires 10. In 476 AD, the Western Roman Empire fell