The club was founded during 1917 in Somma Vesuviana (which lies within the Province of Naples), north of Mount Vesuvius. The club was affiliated in 1919 and took its name from the ship SMS Viribus Unitis with Riccardo Angrisani as its first president. The foundations of the club were;<div style="font-size:90%"></div>
The commissioners for Virbus were Vincenzo Bianco and Gioacchino Mosca. At the time, the club was a multi-purpose one, as well as football it competed in cycling, marathon running and general athletics.
In 1989 Viribus was merged with Polisportiva Somma, hence why today the name of the team is Polisportiva Viribus Unitis.