The collapse of the Habsburg monarchy in the aftermath of World War I marked a foundational shift in the histories of Austria and Hungary. Previously part of the Habsburg’s Austro-Hungarian Empire, this event stripped the two new states of a long-established territorial order, triggering a controversial redrawing of their borders. Whilst scholarship often focuses on the role played by state actors in Vienna and Budapest, The Disputed Austro-Hungarian Border refreshingly re-examines this event through investigating how processes of state and nation-building manifested within the contested region of Western Hungary and Burgenland. In doing so, this book innovatively resituates this border region within the larger context of post-Habsburg historical development taking place across Central Europe.