The first secessio plebis of 494 B.C. was an event in ancient Roman political and social history between 495 and 493 BC, involving a dispute between the patrician ruling class and the plebeian underclass, and was one of a number of secessions by the plebs and part of a broader political conflict known as the conflict of the orders.
The secession was initially sparked by discontent about the burden of debt on the poorer plebeian class. The failure of the patrician rulers, including the consuls and more generally the senate, to address those complaints, and subsequently the senate's outright refusal to agree to debt reforms, caused the issue to flare into a more widespread concern about plebeian rights. As a result, the plebeians seceded and departed to the nearby Mons Sacer (the Sacred Mountain).
Ultimately, a reconciliation was negotiated and the plebs were given political representation by the creation of the office of the Tribune of the Plebs.
The last king of Rome had been expelled in 509 BC and the Roman Republic had been established. In the place of the kings, the city-state was governed by two consuls, elected annually and serving in office for twelve months. Other government institutions included the senate, and various assemblies of the people.
At this time, the consuls were elected from amongst the patricians, who were the upper class in Rome. Likewise the senate was composed only of patricians. The consuls and the senate together exercised the executive and majority of the legislative functions at Rome.
The patricians therefore possessed most of the political powers at Rome, and were also generally more wealthy. The plebeians on the other hand were the majority of the population, and also the majority of the soldiers in the Roman army.
In 495 BC, shortly after the significant Roman victory over the Latins at the Battle of Lake Regillus, rumours had reached Rome of the threat of war from the Volsci. A Roman army under the consul Publius Servilius Priscus Structus entered and then returned from the Volscian lands, seemingly having averted war without shedding any blood.