Attius Tullius was a political and military leader of the Volsci in the early fifth century BC, who sheltered the exiled Roman hero Gaius Marcius Coriolanus, then incited a war with Rome, in which he and Coriolanus led the Volscian forces. He appears in William Shakespeare's tragedy Coriolanus under the name of Tullus Aufidius.
The alliance between Tullius and Coriolanus had its roots in the first great confrontation between Rome's patrician and plebeian classes. In 494 BC, under the weight of crushing debt, the entire body of the plebeians seceded from Rome and took to the Mons Sacer. The patrician envoys negotiated a settlement to the dispute, first by agreeing to debt relief, and then by creating the new and sacrosanct office of the Tribune of the Plebs, in order to protect the interests of the plebeians.
The following year, Gaius Marcius, a young officer in the army of the consul Postumus Cominius, rescued the Roman forces attacking the Volscian town of Corioli from a desperate situation, in which they were simultaneously attacked by a Volscian relief force and a sortie from the town. Marcius led a company of soldiers through the gates of Corioli before they could be closed, and set fire to a number of buildings, effecting the capture of the undefended populace, and winning resounding fame, as well as the surname of Coriolanus.
Soon afterward, Rome was beset by famine, and a large quantity of grain was imported from Sicily. When the plebeians objected to the high price being charged, Coriolanus took a leading role in the patrician opposition to a reduction in price, demanding that if the people wished to have last year's price, they should agree to surrender their hard-won privileges and give up the tribunate. Notwithstanding his fame and heroic deeds, Coriolanus soon found himself the object of the people's scorn. Believing his life in danger, he fled into exile amongst the Volsci, the very people whom he had helped to defeat, where he was sheltered by the Volscian leader, Attius Tullius.