After Caesar's assassination, Octavian, Antony, and Lepidus formed the Second Triumvirate to avenge his death and seize power. They eliminated opponents through proscriptions and consolidated control over Rome's territories.

Tensions within the triumvirate led to conflict between Octavian and Antony. Octavian's victory at Actium in 31 BCE paved the way for his sole rule, marking the end of the Republic and rise of the Roman Empire.

Formation of the Second Triumvirate

Triumvirate Formed to Avenge Caesar's Death

• Second Triumvirate formed in 43 BCE as an alliance between Octavian, Mark Antony, and Lepidus
• Triumvirate members aimed to avenge the assassination of Julius Caesar and consolidate their power over the Roman Republic
• Octavian, adopted son and heir of Julius Caesar, sought to establish his political authority and claim to Caesar's legacy
• Mark Antony, a skilled military commander and close ally of Caesar, played a key role in the formation of the triumvirate
• Lepidus, a influential politician and pontifex maximus, joined the alliance to secure his position and share power

Proscriptions and Elimination of Opponents

• Triumvirate members initiated proscriptions, a series of executions targeting their political enemies and opponents
• Proscriptions aimed to eliminate potential threats to the triumvirate's power and confiscate the wealth of the targeted individuals
• Notable victims of the proscriptions included Cicero, a renowned orator and critic of Mark Antony (executed in 43 BCE)
• Proscriptions allowed the triumvirate to consolidate their control over Rome by removing opposition and redistributing confiscated property to their supporters
• Proscriptions set a precedent for the use of violence and intimidation as a means of political control in the late Roman Republic

Consolidation of Power

Military Victories and Territorial Expansion

• Battle of Philippi in 42 BCE marked a decisive victory for the triumvirate against the forces of Brutus and Cassius, the lead assassins of Julius Caesar
• Octavian and Mark Antony led their armies to defeat the republican forces, solidifying their control over the Roman Republic
• After the victory at Philippi, the triumvirate divided the Roman territories among themselves (Octavian in the West, Antony in the East, Lepidus in Africa)
• Territorial division allowed each triumvir to consolidate their power and establish their authority in their respective regions
• Antony's involvement with Cleopatra VII, queen of Egypt, strengthened his position in the East and provided access to Egyptian wealth and resources

Conflict and Rivalry within the Triumvirate

• Battle of Actium in 31 BCE marked the culmination of the growing rivalry between Octavian and Mark Antony
• Octavian portrayed Antony as a threat to Rome, accusing him of neglecting his duties and succumbing to the influence of Cleopatra
• Octavian's naval forces, led by his general Agrippa, decisively defeated Antony and Cleopatra's fleet at Actium
• Victory at Actium established Octavian as the dominant power in the Roman world and paved the way for his eventual rise as Emperor Augustus
• Antony and Cleopatra's defeat and subsequent suicides in Alexandria marked the end of their political and personal alliance

End of the Triumvirate

Octavian's Sole Rule and the Rise of the Roman Empire

• Fall of Alexandria in 30 BCE, following the Battle of Actium, marked the end of Ptolemaic Egypt and its absorption into the Roman Republic
• Octavian's capture of Alexandria solidified his control over the eastern Mediterranean and eliminated his last major rival, Mark Antony
• With Antony and Cleopatra's deaths, Octavian emerged as the sole ruler of the Roman Republic, effectively ending the Second Triumvirate
• Octavian's consolidation of power set the stage for his transition from triumvir to Augustus, the first Emperor of the Roman Empire (27 BCE)
• End of the Second Triumvirate marked a significant shift in Roman politics, as the Republic gave way to the imperial system that would shape Rome's future