Roman ambassadors Gaius Fulcinius, Tullus Cloelius, Spurius Antius, and Lucius Roscius were sent to Fidenae, and were put to death by order of king Tolumnius.
In 428 BC, Sergius was selected by the senate, with Quintus Servilius and Mamercus Aemilius Mamercinus to investigate Fidenae and remove some of its people to Ostia.
[9] Again in 424 BC, Sergius was elected military tribune with consular power, with Appius Claudius Crassus, Spurius Nautius Rutilus, and Sextus Julius Iulus.
[11] In 418, Sergius was elected military tribune with consular power for the third time, with Gaius Servilius Axilla and Marcus Papirius Mugillanus.
Sergius took command against the Aequi and fought a battle near their camp on disadvantageous ground, during which he lost his life.