Di Perugia ((install)) - Forza Chiara

I believe you are referring to (Chiara’s Force), the popular name for Chiara Luce Badano (1971–1990), a young Italian from Sassello (near Savona), not Perugia . There is no historically or devotionally recognized “Forza Chiara di Perugia.” However, given the request, the most plausible explanation is a confusion of places or a very localized, unofficial expression of devotion to Chiara Badano that may have spread to Perugia.