Assassination of Julius Caesar in the context of Armed resistance

Lucius Cassius Longinus was the brother of Gaius Cassius Longinus, a leading instigator in the assassination of Julius Caesar.

Around 52 BC, Lucius Longinus was triumvir monetalis in 63 BC. He minted denarii referring to the famous trial of the vestal virgins of 114–113 BC, which was prosecuted by his ancestor Lucius Cassius Longinus Ravilla. In 54 BC, he was the junior co-prosecutor (subscriptor) to Marcus Iuventius Laterensis [la] in the trial of Gnaeus Plancius [la] for electoral malpractice (ambitus). Plancius was defenced by Cicero, who accused Longinus of incompetence, immorality and inexperience in his defence speech, the Pro Plancio.

Augustus (born Gaius Octavius; 23 September 63 BC – 19 August AD 14), also known as Octavian (Latin: Octavianus), was the founder of the Roman Empire, who reigned as the first Roman emperor from 27 BC until his death in AD 14. The reign of Augustus initiated an imperial cult and an era of imperial peace (the Pax Romana or Pax Augusta) in which the Roman world was largely free of armed conflict. The Principate system of government was established during his reign and lasted until the Crisis of the Third Century.

Octavian was born into an equestrian branch of the plebeian gens Octavia. Following the assassination of Julius Caesar in 44 BC, Octavian was named in Caesar's will as his adopted son and heir, and inherited Caesar's name, estate, and the loyalty of his legions. He, Mark Antony, and Marcus Lepidus formed the Second Triumvirate to defeat the assassins of Caesar. Following their victory at the Battle of Philippi (42 BC), the Triumvirate divided the Roman Republic among themselves and ruled as de facto oligarchs. The Triumvirate was eventually torn apart by the competing ambitions of its members; Lepidus was exiled in 36 BC, and Antony was defeated by Octavian's naval commander Marcus Agrippa at the Battle of Actium in 31 BC. Antony and his wife Cleopatra, the Ptolemaic queen of Egypt, killed themselves during Octavian's invasion of Egypt, which then became a Roman province.

Marcus Antonius (14 January 83 BC – 1 August 30 BC), commonly known in English as Mark Antony, was a Roman politician and general who played a critical role in the transformation of the Roman Republic from a constitutional republic into the autocratic Roman Empire.

Antony was a relative and supporter of Julius Caesar, and he served as one of his generals during the conquest of Gaul and Caesar's civil war. Antony was appointed administrator of Italy while Caesar eliminated political opponents in Greece, North Africa, and Spain. After Caesar's assassination in 44 BC, Antony joined forces with Lepidus, another of Caesar's generals, and Octavian, Caesar's great-nephew and adopted son, forming a three-man dictatorship known to historians as the Second Triumvirate. The Triumvirs defeated Caesar's killers, the Liberatores, at the Battle of Philippi in 42 BC, and divided the government of the Republic among themselves. Antony was assigned Rome's eastern provinces, including the client kingdom of Egypt, then ruled by Cleopatra VII, and was given the command in Rome's war against Parthia.

The Second Triumvirate was an extraordinary commission and magistracy created at the end of the Roman republic for Mark Antony, Lepidus, and Octavian to give them practically absolute power. It was formally constituted by law on 27 November 43 BC with a term of five years; it was renewed in 37 BC for another five years before expiring in 32 BC. Constituted by the lex Titia, the triumvirs were given broad powers to make or repeal legislation, issue judicial punishments without due process or right of appeal, and appoint all other magistrates. The triumvirs also split the Roman world into three sets of provinces.

The triumvirate, formed in the aftermath of a conflict between Antony and the senate, emerged as a force to reassert Caesarian control over the western provinces and wage war on the liberatores led by the men who assassinated Julius Caesar. After proscriptions, purging the senatorial and equestrian orders, and a brutal civil war, the liberatores were defeated at the Battle of Philippi. After Philippi, Antony and Octavian took the east and west, respectively, with Lepidus confined to Africa. The last remaining opposition to the Triumvirs came from Sextus Pompey, a son of Pompey the Great, who controlled Sicily, Corsica and Sardinia.

Gaius Cassius Longinus (Classical Latin: [ˈɡaːi.ʊs ˈkassi.ʊs ˈlɔŋɡɪnʊs]; c. 86 BC – 3 October 42 BC) was a Roman senator and general best known as a leading instigator of the plot to assassinate Julius Caesar on 15 March 44 BC. He was the brother-in-law of Brutus, another leader of the conspiracy. He commanded troops with Brutus during the Battle of Philippi against the combined forces of Mark Antony and Octavian, Caesar's former supporters, and committed suicide after being defeated by Mark Antony.

Cassius was elected as tribune of the plebs in 49 BC. He opposed Caesar, and eventually he commanded a fleet against him during Caesar's Civil War: after Caesar defeated Pompey in the Battle of Pharsalus, Caesar overtook Cassius and forced him to surrender. After Caesar's death, Cassius fled to the east to Syria, where he amassed an army of twelve legions. He was supported and made governor by the Senate. Later he and Brutus marched west against the allies of the Second Triumvirate.

Gaius Julius Caesar (12 or 13 July 100 BC – 15 March 44 BC) was a Roman general and statesman. A member of the First Triumvirate, Caesar led the Roman armies in the Gallic Wars before defeating his political rival Pompey in a civil war. He subsequently became dictator from 49 BC until his assassination in 44 BC. Caesar played a critical role in the events that led to the demise of the Roman Republic and the rise of the Roman Empire.

In 60 BC, Caesar, Crassus, and Pompey formed the First Triumvirate, an informal political alliance that dominated Roman politics for several years. Their attempts to amass political power were opposed by many in the Senate, among them Cato the Younger with the private support of Cicero. Caesar rose to become one of the most powerful politicians in the Roman Republic through a string of military victories in the Gallic Wars, completed by 51 BC, which greatly extended Roman territory. During this time, he both invaded Britain and built a bridge across the river Rhine. These achievements and the support of his veteran army threatened to eclipse the standing of Pompey. The alliance between Caesar and Pompey slowly broke down and, by 50 BC, Pompey had realigned himself with the Senate. With his command expiring and the Gallic Wars largely concluded, the Senate ordered Caesar to step down from his military command and return to Rome. In early January 49 BC, Caesar openly defied the Senate by crossing the Rubicon and marching towards Rome at the head of an army. This began Caesar's civil war, which he won, leaving him in a position of near-unchallenged power and influence in 45 BC.

Marcus Vipsanius Agrippa (/əˈɡrɪpə/; c. 63 BC – 12 BC) was a Roman general and statesman who was a close friend, son-in-law and lieutenant to the Roman emperor Augustus. Agrippa is well known for his important military victories, notably the Battle of Actium in 31 BC against the forces of Mark Antony and Cleopatra. He was also responsible for the construction of some of the most notable buildings of his era, including the original Pantheon.

Born to a plebeian family c. 63 BC, in an uncertain location in Roman Italy, he met the future emperor Augustus, then known as Octavian, at Apollonia, in Illyria. Following the assassination of Octavian's great-uncle Julius Caesar in 44 BC, Octavian returned to Italy. Around this time, Agrippa was elected tribune of the plebs. He served as a military commander, fighting alongside Octavian and Caesar's former general and right-hand man Mark Antony in the Battle of Philippi. In 40 BC, he was praetor urbanus and played a major role in the Perusine war against Lucius Antonius and Fulvia, respectively the brother and wife of Mark Antony. In 39 or 38 BC, Agrippa was appointed governor of Transalpine Gaul. In 38 BC, he put down a rising of the Aquitanians and fought the Germanic tribes. He was made consul for 37 BC, despite being well below the usual minimum age of 43, in order to oversee the preparations for war against Sextus Pompey, who had cut off grain shipments to Rome.

Lucius Junius Brutus (died c. 500 BC) was the semi-legendary founder of the Roman Republic and traditionally one of its two first consuls. Depicted as responsible for the expulsion of his uncle, the Roman king Tarquinius Superbus after the rape and suicide of Lucretia, in the traditional accounts it is he who led the overthrow of the Roman monarchy. He was then involved in securing the abdication of fellow consul Tarquinius Collatinus, and the suppression of a plot to restore the Tarquinian monarchy.

He was claimed as an ancestor of the Roman gens Junia, including Decimus Junius Brutus and Marcus Junius Brutus, the most infamous of Julius Caesar's assassins. Traditions about his life may have been fictional, and some scholars argue that it was the Etruscan king Porsenna who overthrew Tarquinius. The plebeian status of the Junia gens has also raised doubts about his position as a consul and the alleged initial patrician domination of the office. Depicted as the nephew of Tarquinius, he may have symbolized the internal tensions that occurred during the transition between the monarchy and the republic.

The Battle of Philippi was the final battle in the Liberators' civil war between the forces of Mark Antony and Octavian (of the Second Triumvirate) and the leaders of Julius Caesar's assassination, Brutus and Cassius, in 42 BC, at Philippi in Macedonia. The Second Triumvirate declared the civil war ostensibly to avenge Julius Caesar's assassination in 44 BC, but the underlying cause was a long-brewing conflict between the Optimates and the Populares.

The battle, involving up to 200,000 men in one of the largest of the Roman civil wars, consisted of two engagements in the plain west of the ancient city of Philippi. The first occurred in the first week of October; Brutus faced Octavian, and Antony's forces fought those of Cassius. The Roman armies fought poorly, with low discipline, nonexistent tactical coordination, and amateurish lack of command, with neither side able to exploit opportunities as they developed. At first, Brutus pushed back Octavian and entered his legions' camp. However, to the south, Cassius was defeated by Antony and died by suicide after hearing a false report that Brutus had also failed. Brutus rallied Cassius's remaining troops, and both sides ordered their army to retreat to their camps with their spoils. The battle was essentially a draw but for Cassius's suicide. A second encounter, on 23 October, finished off Brutus's forces after a hard-fought battle. He took his own life in turn, leaving the triumvirate in control of the Roman Republic.

The War of Mutina (December 44 – April 43 BC; also called the Mutina war) was a civil war between the Roman Senate and Mark Antony in Northern Italy. It was the first civil war after the assassination of Julius Caesar. The main issue of the war was attempts by the Senate to resist Antony's forceful assumption of the strategically important provinces of Transalpine and Cisalpine Gaul from their governors. The Senate, led by Cicero and the consuls (Aulus Hirtius and Gaius Vibius Pansa), attempted to woo Julius Caesar's heir (today known in this period as Octavian) to fight against Antony. Octavian, however, would pursue his own agenda.

The consuls, with Octavian, led troops into northern Italy against Antony and won two battles at Forum Gallorum and Mutina (14 and 21 April 43 BC). After the two consuls were mortally wounded at those battles, there emerged a political vacuum. Octavian – with the support of his men – demanded the consulship from the Senate and marched on Rome. After taking control of the city, Octavian and one of his kinsmen, Quintus Pedius, were irregularly elected consuls. They forced through legislation which had the effect of outlawing Julius Caesar's killers before starting negotiations with Antony. The negotiations resulted in the two men reconciling. With Lepidus, they then formed the Second Triumvirate.

The Liberators' civil war (43–42 BC) was started by the Second Triumvirate to avenge Julius Caesar's assassination. The war was fought by the forces of Mark Antony and Octavian (the Second Triumvirate members, or Triumvirs) against the forces of Caesar's assassins, led by Marcus Junius Brutus and Gaius Cassius Longinus, referred to as the Liberatores. The latter were defeated by the Triumvirs at the Battle of Philippi in October 42 BC, and committed suicide. Brutus committed suicide after the second part of the battle.

Marcus Junius Brutus (/ˈbruːtəs/; Latin: [ˈmaːrkʊs juːniʊs ˈbruːtʊs]; c. 85 BC – 23 October 42 BC) was a Roman politician, orator, and the most famous of the assassins of Julius Caesar. After being adopted by a relative, he used the name Quintus Servilius Caepio Brutus, which was retained as his legal name. He is often referred to simply as Brutus.

Early in his political career, Brutus opposed Pompey, who was responsible for Brutus' father's death. He also was close to Caesar. However, Caesar's attempts to evade accountability in the law courts put him at greater odds with his opponents in the Roman elite and the senate. Brutus eventually came to oppose Caesar and sided with Pompey against Caesar's forces during the ensuing civil war (49–45 BC). Pompey was defeated at the Battle of Pharsalus in 48, after which Brutus surrendered to Caesar, who granted him amnesty.

The Ides of March (/aɪdz/; Latin: Idus Martiae, Medieval Latin: Idus Martii) is the day on the Roman calendar marked as the Idus, roughly the midpoint of a month, of Martius, corresponding to 15 March on the Gregorian calendar. It was marked by several major religious observances. In 44 BC, it became notorious as the date of the assassination of Julius Caesar, which made the Ides of March a turning point in Roman history.

The Curia of Pompey was one of several named meeting halls from Republican Rome of historic significance. A curia was a designated structure for meetings of the senate. The Curia of Pompey was located at the entrance to the Theater of Pompey.

The Curia was attached to the porticus directly behind the theatre section and was a Roman exedra, with a curved back wall and several levels of seating. It was where the Senate met on the Ides of March in 44 BC and where the dictator Julius Caesar was assassinated. After Caesar's death, his heir Augustus removed the large statue of Pompey and had the hall walled up. Eventually it was converted into a latrine.

The Theatre of Pompey (Latin: Theatrum Pompeii, Italian: Teatro di Pompeo), also known by other names, was a structure in Ancient Rome built during the latter part of the Roman Republican era by Pompey the Great. Completed in 55 BC, it was the first permanent theatre to be built in Rome. Its ruins are located at Largo di Torre Argentina.

Enclosed by the large columned porticos was an expansive garden complex of fountains and statues. Along the stretch of the covered arcade were rooms dedicated to the exposition of art and other works collected by Pompey during his campaigns. On the opposite end of the garden complex was the Curia of Pompey for political meetings. The senate would often use this building along with a number of temples and halls that satisfied the requirements for their formal meetings. The curia is infamous as the place where Julius Caesar was assassinated by Brutus and Cassius during a session of the Senate on 15 March 44 BC.

Decimus Junius Brutus Albinus (27 April 81 BC – September 43 BC) was a Roman general and politician of the late republican period and one of the leading instigators of Julius Caesar's assassination. He had previously been an important supporter of Caesar in the Gallic Wars and in the civil war against Pompey. Decimus Brutus is often confused with his distant cousin and fellow conspirator, Marcus Junius Brutus.

Due to a typographical error in a 16th-century English publication, he is often known in English-speaking popular culture as Decius Brutus.