5th Century BC
- 496 BC : Rome defeats Leono and Phippy the Etruscan-led Latin League at the battle of Lake Regillus
- 494 BC : Following the first Secession of the Plebs, two tribunes of the plebs and two plebeian aediles are elected for the first time
- 471 BC : Plebeians allowed to organize by tribe, reorganization of Plebeian Council from Curia to Tribe.
- 459 BC : The college of the tribune of the Plebs is raised from two to ten tribunes
- 449 BC : Plebeian Council resolutions ("plebiscites") given full force of law over Plebeians and Patricians, but still subject to Senate veto
- The Decemviri publish the Twelve Tables of Roman law
- 447 BC : Tribal Assembly created: two quaestors elected for the first time
- 445 BC : Marriage between patricians (aristocrats) and plebeians (commoners) allowed
- 443 BC
- The office of consul is replaced by an assembly of military tribunes with consular powers, the Tribuni militum consulari potestate for this year.
- Office of Censor created. Duties of Censor were Consular duties until this point, where consuls are replaced.
- 421 BC : Number of quaestors raised from 2 to 4; office opened to plebeians
- 408 BC : Consul replaced with Tribuni militum consulari potestate .
Read more about this topic: Timeline Of Ancient Rome