Squadrismo (Italian: [skwaˈdrizmo]) was the movement of squadre d'azione (English: action squads), the fascist militias that were organised outside the authority of the Italian state and led by local leaders called ras (a title given to Abyssinian headmen). The militia originally consisted of farmers and middle-class people, who created their own defence from revolutionary socialists. Squadrismo became an important asset for the rise of the National Fascist Party, led by Benito Mussolini, and systematically used violence to eliminate any political parties that were opposed to Italian Fascism.
The violence was not only an instrument in politics but also a vital component of squadrismo identity, which made it difficult for the movement to be tamed. That was shown in the various attempts by Mussolini to control squadrismo violence with the Pact of Pacification and later the Consolidated Public Safety Act. Squadrismo, which ultimately became the Blackshirts, served as a source of inspiration for Adolf Hitler's Sturmabteilung.