The volume presents a special unpublished corpus of sound recordings and documentary materials concerning Italian soldiers detained in German prison camps during the Great War. Created in the field, in 1918, this corpus is part of a much larger collection curated by the Phonographische Kommission, a research team composed of linguists, musicologists and ethnologists, directly financed by Kaiser Wilhelm II, with the aim of collecting, through the voices of the prisoners, elements on the language, the music, the culture of the peoples whose armies fought against the Vierbund (fourfold alliance). The corpus of Italian materials is reported in its entirety in the four compact discs attached, containing audio files (CDs 1-3) and scans of paper sources, including data relating to individual soldiers and notations on what they performed (CD 4). The volume also reports the results of a preliminary analytical work on the corpus created by Ignazio Macchiarella for the musicological aspect and by Emilio Tamburini for the historical-cultural aspect, with a premise by Britta Lange, one of the greatest scholars of the collections made in the fields German prisoners during the first world conflict. The work was carried out in collaboration with the Phonogrammarchiv of the Ethnologisches Museum zu Berlin, the Lautarchiv of the Humboldt Universität zu Berlin and the Labimus / Department of Cultural Heritage History and Territory of the University of Cagliari.