Born into a large family of Italian nationalist traditions (he had eleven brothers and sisters, and he and all his brothers were given names beginning with "I" for "Italy"), from his youth he was one of the leading members of the Fiuman irredentism, being among the founder of the irredentist association La Giovane Fiume in 1904.

In 1911 La Giovane Fiume was dissolved and he was forced to leave Fiume due to his irredentist activities; in 1913 he returned and founded a pro-Italian newspaper, Il Giorno, which was also shut down by order of the Austro-Hungarian authorities and he was forced to leave the city again.

During the First World War he volunteered for the Royal Italian Army along with his younger brothers Ipparco (who was killed in action in 1916) and Iti, and after the end of the war he participated in Gabriele D'Annunzio's occupation of Fiume in 1919-1920 together with Iti, being appointed Minister of the Interior and Justice of the Regency of Carnaro.

[1][2][3][4] Following the annexation of Fiume by Italy in 1924, he "Italianized" his surname in Bacci and joined the National Fascist Party.

He remained in Fiume during World War II, without participating in the political life (unlike fellow Fiuman senator and irredentist Riccardo Gigante, he did not join the Italian Social Republic), and refused to leave the city even when it was occupied by the Yugoslav People's Liberation Army in May 1945.