The Arditi del Popolo and the local Proletarian Legion Filippo Corridoni created a front including the left-wing interventionists from Parma.

The Parmesan revolutionary syndicalists approached the left, highlighting the difficulties of fascism in finding consensus in Parma, as shown in the diaries of Italo Balbo.

[3] Here an armed resistance "of excellent military caliber" was organized, according to Italo Balbo, sent by Michele Bianchi, at the request of the fascist deputy Terzaghi, the local quadrunvirate, close to Roberto Farinacci's positions.

[4] The whole population actively participated in the clashes, including the women who gave a fundamental contribution both as fighters and for the organization of the rear, and for this reason were praised by Balbo himself.

The population of the Oltretorrente and of the Naviglio and Saffi districts prepared for the aggression, building barricades and digging trenches under the command of the anarchist Antonio Cieri, wanting to defend to the bitter end the headquarters of the proletarian and centrist organizations knowing the devastation that the fascists had done in other places, as in the Ravenna, led by Italo Balbo.