[8] Sponsored by Alceste De Ambris, Mussolini, and Angelo Oliviero Olivetti, it was a pro-war movement aiming to promote Italian entry into World War I.

After the war, almost all of them met in 1919 in Piazza San Sepolcro for the foundation of the Fasci Italiani di Combattimento, which preceded the National Fascist Party founded in 1921.

[9]: 27  In this context, the Fasci d'Azione Rivoluzionaria was created as an umbrella organization for pro-war activists led by Benito Mussolini, who were called interventionists because they wished for Italy to intervene in the war.

[6]: 41  Mussolini asserted on this occasion that Italy should join the war "for the liberation of the unredeemed peoples of Trentino and Istria", which implied territorial claims over regions inhabited by ethnic Italians.

[6]: 49  During an interventionist demonstration on 11 April 1915 that was confronted by neutralist PSI members, Italian state police killed one man, an electrician named Innocente Marcora.