Polemics, protests, silences, disinterest and reticence: the Treaty of Osimo, signed in the town in the Marche region on 10 November 1975, marked a controversial page in the history of the eastern Italian border. In the face of historians, observers and politicians who judged it a masterpiece in the creation of an Italian Ostpolitik in the midst of the Cold War aimed at perfecting the already good relations with communist Yugoslavia, the Treaty of Osimo was immediately opposed by the Istrian, Fiume and Dalmatian exiles, while in Parliament the only vain opposition came from the Italian Social Movement. If at the time the bilateral agreement between Italy and Yugoslavia...