Augustus was born Gaius Octavius near Rome on Sept. 23, 63 BC. After Julius Caesar, his great-uncle, adopted him and made him his heir, he was known as Gaius Julius Caesar Octavianus, or Octavian. When Caesar was assassinated in 44 BC, Octavian, then 18, was living in Illyria, across the Adriatic. A letter from his mother warned him to flee eastward. Instead, he hurried to Rome. In the power struggle that followed Caesar's death, his old soldiers rallied to Octavian. The youth also won the support of the Roman senate. Mark Antony and Lepidus, his chief rivals, were forced to come to terms with him. Together they formed a triumvirate (government by three). At Philippi, in 42 BC, they defeated the republican army, headed by Brutus and Cassius. Lepidus was later stripped of his power. Antony and Octavian then divided the Roman world between them, with Octavian supreme in Italy and the West.
Antony took over the eastern provinces but neglected them to spend time at the court of the Egyptian queen, Cleopatra, in Alexandria. Octavian got the Roman senate to declare war on Egypt and won a decisive victory in the naval battle of Actium in 31 BC. Antony and Cleopatra escaped to Alexandria. The next year Octavian defeated Antony again in Egypt. Antony and Cleopatra committed suicide. Egypt was annexed to Rome, and Octavian returned to Rome in triumph.
The battle of Actium made Octavian master of Rome and its provinces. He kept up a show of republican government, with himself as first citizen (princeps civitatis). However, historians consider the date 31 BC to mark the end of the Roman Republic and the beginning of the Roman Empire. In 27 BC the senate conferred on Octavian the title Augustus (the exalted or sacred one), implying he was more than a man but not quite a god. Later he was acclaimed Pater Patriae (father of his country).
After a series of victories, the expansion of Augustus' empire was stopped at the Rhine River by the Germans' defeat of the Roman general Varus in AD 9. From this time Augustus concentrated on domestic problems and the reform of the army. The political system he established endured essentially without change for three centuries. He did so much to beautify Rome that it was said he found a city of brick and left a city of marble. He also founded cities in the provinces, encouraged agriculture, promoted learning, and patronized the arts. The great writers Virgil, Horace, Livy, and Ovid flourished in this Augustan age‹a term since used to describe periods of great literary achievement in modern nations. Although he was never in good health, Augustus' will helped him to survive. After his death, on Aug. 19, AD 14, he was deified. He was succeeded by his adopted son, Tiberius. (Britannica Student Encyclopedia)
The first emperor of Rome was Augustus. During his long reign, which began in 27 BC during the Golden Age of Latin literature, the Roman world also entered a splendid era of civil peace and prosperity.