After the Nazi-engineered Gran Sasso raid liberated Mussolini in September, the PNF was revived as the Republican Fascist Party ("Partito Fascista Repubblicano" – PFR; September 13), as the single party of the Northern and Nazi-protected Italian Social Republic (the Salò Republic). Its secretary was Alessandro Pavolini. The PRF did not outlast Mussolini's execution and the disappearance of the Salò state in April 1945.