Augustus implemented several key reforms in Rome during his reign, which began in 27 BC. Most notably, he established a new administrative framework that centralized power while maintaining the appearance of the Republic. Augustus reformed the tax system, improving revenue collection and increasing efficiency. He also reorganized the military by creating a standing army and the Praetorian Guard, ensuring loyalty to the emperor. Additionally, Augustus fostered an era of peace known as the Pax Romana, promoting trade and cultural development throughout the empire. His reforms laid the foundation for imperial Rome and significantly influenced governance in future empires.