In the aftermath of World War I, what used to be the Habsburg Empire split up into several nation states. But where to draw a border between the new Austrian Republic and the Hungarian nation state? In this episode, Leonid Motz (RECET) speaks with Hannes Grandits (HU Berlin) and Katharina Tyran (University of Helsinki) about their new edited volume The Disputed Austro-Hungarian Border: Agendas, Actors, and Practices in Western Hungary/Burgenland after World War I (with Ibolya Murber, published with Berghahn). They highlight how border-making was contested, negotiated, and experienced on the ground in one of the former Empire’s most multiethnic and multilingual regions—and what these debates reveal about nation‑state formation, identity, and transnational continuities in post‑1918 Central Europe. Hannes Grandits is Professor of Southeast European History at Humboldt University in Berlin.  Katharina Tyran is Associated Professor in Slavic Philology at the University of Helsinki.