Thesis advisor: Devin O. Pendas / This dissertation studies the cooperation and competition amongst various right-wing paramilitaries in the southeastern portions of German-speaking Europe. My work overturns stereotypical, teleological narratives that presume any far-fight German extremism inherently meant “the rise of Nazism.” Instead, I reveal a complex mosaic of far-right paramilitary men, whose allegiances to and rivalries with each other oscillated with shifting situational contexts across one of the most contested and chaotic borders in interwar Europe. Consequently, my research results open new possibilities for conceptualizing volatile twentieth-century borderlands as stemming not just from international conflicts but also from intra-national infighting. Paramilitary men on both sides of the Austro-Bavarian border considered themselves German, but they conceived of their “Germanness” in very specific terms: southeastern, Catholic, and Alpine in contrast to the northern, Protestant, and Prussian variant of Germandom. How did right-wing groups blend greater German nationalism with their southeastern German regionalism? The hybridization of these two loyalties created an intoxicating affective brew that brought together right-wing agents on both sides of this border in fraternal solidarity but also instigated fratricidal violence, all as these German groups sought to settle the question of what it meant to be German. National identities founded on southeastern regional impulses thus formed a constitutive contradiction of greater German nationalism. The intersectionality of regionalism and nationalism generated internecine right-wing violence, as these groups disagreed over how to implement disparate versions of unification. The result was twenty years of street brawls, assassinations, terror, Putsch attempts, mobilizations, and transborder smuggling of munitions, troops, and funds. This region was thus a paragon of borderlands conflict. The crux was that it was an intra-national borderland: to these activists, national union should have been so simple, making it all the more frustrating when it eluded them. The assumed common nationality meant any perceived dissident was not simply a political opponent but something far worse: a traitor. Paradoxically, the supposedly “agreed-upon” national identity exacerbated borderland chaos and violence. Historians of Eastern and Central Europe have falsely conflated borderlands with spaces between nations in which multi-national populations struggle among each other for hegemony. My work overturns such assumptions by offering the first analysis of European borderlands violence stemming from a perceived communal nationality. This project thus serves as a needed corrective to the scholarship, offering a richly informed regional analysis with significant interventions in the broader fields of borderlands and right-wing extremism. / Thesis (PhD) — Boston College, 2022. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: History.