How did Augustus bring peace to Rome?

Answer 1

He took on the powers of a tribune of the plebsin the city and pro-magistrate outside the city, which gave him over-riding authority while still keeping the Senate to front as government.

He took control of the frontier provinces, leaving the Senate in control of the remainder - the frontir ones had the legions, so he kept them out of the hands of over-ambitious senators who had been the originators of the revolutions of the previous century.

He put the brakes on territorial expansion, establishing defendable frontiers and establishing diplomatic relations with neighbouring states.

Answer 2

At first Caesar himself created war. He defied an order of the senate to disband his armies with which he had conquered Gaul and marched on Rome. This led to a civil war against the forces of the senate. Caesar won. After that he weakened the power of the senate and concentrated power in his hands. This created a stronger central government.

Answer 3

Augustus concluded a period of 100 years of civilwar