Augustus (Octavian) (23 September 63 BC – 19 August 14 AD) was the founder of the Roman Empire and its first Emperor, ruling from 27 BC until his death in AD 14.
After the demise of the Second Triumvirate, Augustus
restored the outward facade of the free Republic, with governmental power vested in the Roman Senate, the executive magistrates, and the legislative assemblies.
In reality, however, he retained his autocratic power over the Republic as a military dictator. By law, Augustus held a collection of powers granted to him for life by the Senate, including supreme military command, and those of tribune and censor. It took several years for Augustus to develop the framework within which a formally republican state could be led under his sole rule. He rejected monarchical titles, and instead called himself Princeps Civitatis ("First Citizen of the State").
Octavian's aims from this point forward were to return Rome to a state of stability, traditional legality, and civility by lifting the overt political pressure imposed on the courts of law and
ensuring free elections—in name at least.
In 27 BC, Octavian
made a show of returning full power to the Roman Senate and relinquishing his control of the Roman provinces and their armies. Under his consulship, however, the Senate had little power in initiating legislation by introducing bills for senatorial debate. Octavian was no longer in direct control of the provinces and their armies, but he retained the loyalty of active duty soldiers and veterans alike.
The careers of many clients and adherents depended on his patronage, as his financial power was unrivaled in the Roman Republic.
According to H. H. Scullard, however, Augustus's power was based on the exercise of "a predominant military power and ... the ultimate sanction of his authority was force, however
much the fact was disguised."
https://en.wikipedia.org/wiki/Augustus