Quintus Sertorius was a Roman general and statesman who led a large-scale rebellion against the Roman Senate on the Iberian peninsula. He had been a prominent member of the populist faction of Cinna and Marius. During the later years of the civil war of 83–81 BC, he was sent to recover the Iberian Peninsula. When his faction lost the war, Sertorius was proscribed (outlawed) by the dictator Sulla. Supported by a majority of the native Iberian tribes, Sertorius skillfully used irregular warfare to repeatedly defeat various commanders sent by Rome to subdue him. He was never decisively beaten on the battlefield and remained a thorn in the Senate's side until his murder in 73 BC.

Sulla's civil war was fought between the Roman general Lucius Cornelius Sulla and his opponents, the Cinna-Marius faction, in the years 83–82 BC. The war ended with a decisive battle just outside Rome itself. After the war the victorious Sulla made himself dictator of the Roman Republic.