Sulla and the First March on Rome
Roman soldiers clashed in the streets as Sulla turned his legions on his own city.

Théodore Rousseau — "The Forest in Winter at Sunset" (ca. 1846–67), public domain
A Roman general turns on Rome.
In 88 BC, Lucius Cornelius Sulla did what no Roman had dared: he led his own army against the city. Senators fled as battle lines formed in the streets. Sulla’s soldiers stormed the Sacred Way—the heart of Rome now a combat zone.
The rules break overnight.
The cause? A bitter feud with Gaius Marius over command of the war against Mithridates. Sulla’s march shattered 400 years of tradition—no Roman army was supposed to cross the pomerium, the city’s sacred boundary. Suddenly, civil war was a fact of life.
A republic forever changed.
Old boundaries never recovered. Once generals learned they could seize power at swordpoint, Rome’s age of civil conflict began—setting the stage for Caesar, Octavian, and the end of the Republic.
The Republic’s rules shattered when Sulla marched on Rome, unleashing civil war that made blood in the Forum a new normal.