“After the Battle of Actium, Octavian invaded Egypt in 30 BC and annexed Egypt as a Roman province, ending the rule of Cleopatra VII Philopator.”

Primary ancient source excerpt (translated): In 30 BC, Octavian entered Alexandria; Antony and Cleopatra died by suicide. Octavian took possession of Egypt, making it his personal property rather than a public province governed by the senate, due to its wealth and strategic importance.

The Ptolemaic line, of Macedonian-Greek ethnicity, would continue to rule Egypt until the death of Cleopatra VII in 30 BCE, when it was taken by Rome. Octavian would defeat Cleopatra and Antony in the Battle of Actium in 31 BCE, ending her reign. She and Antony would then both commit suicide the following year, and Octavian would found the Roman Empire and relegate Cleopatra to a minor chapter in Rome's past.

After the naval defeat at Actium (31 BCE), Cleopatra and Antony retreated to Egypt. In 30 BCE, Octavian invaded Egypt, leading to the suicides of Antony and Cleopatra. Octavian annexed Egypt as a Roman province, marking the end of Cleopatra VII's rule and the Ptolemaic Kingdom.

Following defeat at Actium in 31 B.C., Octavian invaded Egypt in 30 B.C. Cleopatra and Antony committed suicide, and Octavian annexed Egypt, becoming the first Roman emperor Augustus.

During the winter, Antony's allies started to switch sides (e.g., Herod of Judaea), and in 30, Octavian pursued his enemies to Egypt. When he laid siege to Alexandria, Mark Antony and Cleopatra committed suicide. Now, Octavian could start his one-man rule, calling himself Augustus.

By 30 BC, Antony and Cleopatra were trapped in Egypt. They were faced with overwhelming force. Their defeat was inevitable. Antony did well in the first skirmishes outside Alexandria but faced with near certain death, the fleet defected. Antony killed himself almost immediately. Cleopatra tried to negotiate. The invasion of Egypt was, though, treated as a foreign war.

In 30 BC, Octavian invaded Egypt. Antony, believing Cleopatra dead, took his own life. Cleopatra, refusing the humiliation of being paraded in a Roman triumph, chose suicide—traditionally by the bite of an asp, though historians debate the likelihood of poison. Caesarion, her son by Caesar, was executed on Octavian’s orders. Egypt was annexed as the personal province of Augustus, securing Rome a vital source of grain and wealth.

Ancient sources like Plutarch's 'Life of Antony' describe Octavian's invasion of Egypt in 30 BC following Actium, Antony's suicide, Cleopatra's subsequent death by suicide (method debated: asp or poison), and the formal annexation of Egypt as a Roman province under Augustus, ending Ptolemaic rule. This is corroborated by Cassius Dio and Strabo, marking the transition from Hellenistic to Roman Egypt.

The Battle of Actium, which marked the culmination of a longer naval campaign, tipped the balance decisively in Octavian’s favor. At the time of Actium, control of the Roman empire was divided between Mark Antony in the east and Octavian in the west. Antony’s main ally, as well as his lover, was Cleopatra, queen of Egypt.

When Antony lost the battle, Cleopatra also lost her grip on power, and Egypt became part of the newly formed Roman Empire. The worst arrived when Octavian invaded Egypt in 30 BCE. He faced little resistance and took Alexandria easily. Falsely believing Cleopatra had died, Antony took his own life. Cleopatra then tried to negotiate with Octavian, but rather than be brought back to Rome as a political prisoner and trophy, she also took her own life.

Cleopatra's suicide was a final act of defiance against Rome and Octavian, a symbolic gesture that has survived the sands of time. After arranging Antony’s funeral, she and her children were taken prisoners and Cleopatra afraid of being humiliated (like her sister) decided to take her life.

On August 1, 30 BC, Octavian entered the ancient city of Alexandria, Egypt... In July 30 BC, Octavian's legions advanced into Egypt, surrounding Alexandria from both east and west... With their deaths [Antony and Cleopatra], the Ptolemaic dynasty came to an end. Octavian annexed Egypt as a personal possession of the Roman state, not as a senatorial province.

In the summer of 30 BC, his forces reached Alexandria. Antony, defeated in a brief clash on land, took his own life. Cleopatra attempted negotiation, then committed suicide via a snake. Octavian annexed Egypt as his personal province, seized the immense treasure of the kingdom, and eliminated a key independent power that had influenced Roman politics for a century. Cleopatra was the last pharaoh in a line that extended back over 3000 years.

With the incorporation of Egypt as a Roman province, the last independent Hellenistic monarchy was eliminated. This marked the definitive end of the Hellenistic era and the consolidation of Roman hegemony in the eastern Mediterranean.