This thesis examines the various lines of division within a mixed, Czech-German regiment of the Austro-Hungarian Army during the first nine months of the First World War. It focuses on soldiers' experiences while asking how the Army's hierarchical structure and division of labor informed a variety of relationships and loyalties. This approach moves us away from a conventional focus on inter-regimental relationships as the products primarily of nationality. The thesis argues that military status created more powerful bonds and divisions than did nationality. It further argues that frontline loyalties and enmities were mutable and fluctuated alongside experiences at the front. These national and military dividing lines proved surmountable, and soldiers described a "convergence" of previously divided social groups through the tempering experience of battle. The thesis will thus contribute to a reappraisal of the Austro-Hungarian Army by offering a more precise understanding of soldiers' motivations and group loyalties.