The Roman Republic began in 509 BC and eventually transitioned into the Roman Empire. Some key events included the establishment of the Roman Republic in 509 BC, the Punic Wars between Rome and Carthage from 264-146 BC which resulted in Rome gaining control of the western Mediterranean, the transition from Republic to Empire following the rise and assassination of Julius Caesar, and the establishment of the Pax Romana under Augustus from 27 BC to 180 AD which brought peace across the Empire.