Social War (91–87 BC) in the context of "First Mithridatic War"

The Roman Republic (Latin: Res publica Romana [ˈreːs ˈpuːblɪka roːˈmaːna]) was the era of classical Roman civilisation beginning with the overthrow of the Roman Kingdom (traditionally dated to 509 BC) and ending in 27 BC with the establishment of the Roman Empire following the War of Actium. During this period, Rome's control expanded from the city's immediate surroundings to hegemony over the entire Mediterranean world.

Roman society at the time was primarily a cultural mix of Latin and Etruscan societies, as well as of Sabine, Oscan, and Greek cultural elements, which is especially visible in the ancient Roman religion and its pantheon. Its political organisation developed at around the same time as direct democracy in ancient Greece, with collective and annual magistracies, overseen by a senate. There were annual elections, but the republican system was an elective oligarchy, not a democracy, with a number of powerful families largely monopolising the senior magistracies. Roman institutions underwent considerable changes throughout the Republic to adapt to difficulties such as the creation of promagistracies to rule its conquered provinces and, after the Social War during the late Republic, the inclusion of peninsular Italians as citizens and senators.

Lucius Cornelius Sulla Felix (/ˈsʌlə/, Latin pronunciation: [ˈɫuːkius kɔrˈneːlius ˈsulːa ˈfeːliːks]; 138–78 BC), commonly known as Sulla, was a Roman general and statesman of the late Roman Republic. Coming to fame for his military exploits, he was the first general during the late republic to march on Rome and win a civil war. After purging his opponents, he assumed the dictatorship, sought to strengthen the republican system by means of reforms to the constitution, and resigned his plenary powers after their enactment.

Sulla held the office of consul twice and revived the dictatorship. A gifted general, he achieved successes in wars against foreign and domestic opponents. Sulla rose to prominence during the war against the Numidian king Jugurtha, whom he captured as a result of Jugurtha's betrayal by the king's allies, although his superior Gaius Marius took credit for ending the war. He then fought successfully against Germanic tribes during the Cimbrian War, and Italian allies during the Social War. He was awarded the Grass Crown for his bravery at the Battle of Nola. Sulla was closely associated with Venus, adopting the title Epaphroditos, meaning favoured of Aphrodite.

The socii (English: /ˈsoʊʃiaɪ/ SOH-shee-eye) or foederati (English: /ˌfɛdəˈreɪtaɪ/ FED-ə-RAY-ty) were confederates of Rome and formed one of the three legal denominations in Roman Italy (Italia) along with the core Roman citizens (Cives Romani) and the extended Latini. The Latini, who were simultaneously special confederates (Socii Latini) and semi-citizens (Cives Latini), derived their name from the Italic people of which Rome was part (the Latins) but did not coincide with the region of Latium in central Italy as they were located in colonies throughout the peninsula. This tripartite organisation lasted from the Roman expansion in Italy (509-264 BC) to the Social War (91–87 BC), when all peninsular inhabitants south of the Po river were awarded Roman citizenship.

Treaties known as foedus served as the basic template for Rome's settlement with the large array of tribes and city-states of the whole Italian peninsula. The confederacy had its origin in the foedus Cassianum ("Treaty of Cassius", 493 BC) signed by the fledgling Roman Republic with its neighbouring Latin city-states shortly after the overthrow of the Roman monarchy in 510 BC. This provided for mutual defence by the two parties on the basis of an equal contribution to the annual military levy, which was probably under Roman overall command. The terms of the treaty were probably more acceptable to the Latins than the previous type of Roman hegemony, that of the Tarquin kings, as the latter had probably required the payment of tribute and not a simple military obligation.

The etymology of the name of Italy has been the subject of reconstructions by linguists and historians. Considerations extraneous to the specifically linguistic reconstruction of the name have formed a rich corpus of solutions that are either associated with legend (the existence of a king named Italus) or in any case strongly problematic (such as the connection of the name with the grape vine, vitis in Latin).

One theory is that the name derives from the word Italói, a term with which the ancient Greeks designated a tribe of Sicels who had crossed the Strait of Messina and who inhabited the extreme tip of the Italic Peninsula, near today's Catanzaro. This is attested by the fact that the ancient Greek peoples who colonized present-day Calabria, referred to themselves as Italiotes, that is, inhabitants of Italy. This group of Italian people had worshiped the simulacrum of a calf (vitulus, in Latin), and the name would therefore mean "inhabitants of the land of calves (young bulls)". In any case, it is known that in archaic times the name indicated the part located in the extreme south of the Italian Peninsula.

The Bellum Octavianum (Latin for "War of Octavius") was a Roman republican civil war fought in 87 BC between the two consuls of that year, Gnaeus Octavius and Lucius Cornelius Cinna. Cinna was victorious by late 87 BC.

Hostilities broke out after Octavius opposed Cinna's attempts to distribute the Italian citizens enfranchised after the Social War into all voting tribes and to recall the outlawed Gaius Marius from exile. Cinna was ejected from the city after a fight in the Forum. He began touring Italy to recruit men, while the Senate in Rome replaced him with Lucius Cornelius Merula, a priest of Jupiter, in the consulship. Cinna took control of the Roman army stationed at Nola and was joined by the exiled Marius. Octavius won the support of the two other Roman generals in the field in Italy, Metellus Pius and Pompeius Strabo; the Samnites, who were formally at war with Rome, joined Cinna. Peter Brunt estimates that Octavius had some 60,000 men at his disposal while Cinna had around twice that.

The March on Rome of 88 BC was a coup d'état by the consul of the Roman Republic Lucius Cornelius Sulla, who seized power against his enemies Marius and Sulpicius, after they had ousted him from Rome. It was the first time in Roman history that a general ordered his army to march against the Republic.

In 88 BC, Sulla was elected consul and given the command of the war against the king of Pontus Mithridates, who had recently invaded the Roman province of Asia. The same year, Sulla and his colleague Quintus Pompeius Rufus opposed the attempt of the tribune of the plebs Publius Sulpicius to enrol the Italians who received the Roman citizenship at the end of the Social War (91–87 BC). To bypass the consuls' opposition, Sulpicius sought the support of the popular Gaius Marius, who had already been consul six times. Marius demanded for his help that Sulpicius pass a law transferring Sulla's command to him. Using armed gangs to intimidate the tribal assembly, Sulpicius removed Pompeius' consulship and forced Sulla to flee from Rome, after which he enrolled the Italians and gave the Mithridatic command to Marius.