Author of presented here article joined, as the only social anthropologist, an inter-disciplinary research team, formed in 1996, and dominated by historians, but also including an economist, a geographer, a literary scholar and a political scientist. The team members were recruited from research institutions located in Austria, Italy and Slovenia – all were personally familiar with the region, and their objective was to investigate the “causes and consequences of the division of a region by nation-states.” The work of this group emphasized documentation of the past. The contemporary situation – it accounted for lives lived in the region today also was examined. Three leading questions guided our work: How have the institutions of modern bureaucratic states manifested themselves in the life-worlds of people who came to populate a state frontier. How has the presence of the modern bureaucratic state in this borderland transformed local communities? How has the ideology of nationalism intervened in local lives as social facts? Investigation strategy used in such inter-state research project may serve as a positive example of inter-disciplinary collaboration model.