Daniel Mason’s novel is set on the Eastern Front of World War I, a theater of war characterized by immense scale, brutal environmental conditions, and logistical chaos. Unlike the more static trench warfare of the Western Front, the Eastern Front saw vast, fluid movements of armies across Eastern Europe (Dowling, Timothy C. “Eastern Front.” International Encyclopedia of the First World War, 2014). The Austro-Hungarian army, for which the protagonist Lucius serves, was a multi-ethnic force drawn from across a sprawling empire. This diversity created significant communication barriers, as soldiers and officers often spoke different languages, including German, Hungarian, Polish, and Ruthenian. The novel illustrates this when a recruiter notes, “No one can understand each other out there” (33). This linguistic friction compounded the army’s severe organizational challenges. Stationed in a commandeered church in the Carpathian Mountains, Lucius experiences the front’s notoriously harsh winter warfare. As detailed in historical accounts like Alexander Watson’s Ring of Steel (2014), hundreds of thousands of Austro-Hungarian soldiers perished not in combat but from cold, starvation, and disease. Typhus, spread by lice, was particularly devastating. The novel depicts this reality through the quarantine signs for “FLECK-FIEBER!!!” (41, German for typhus, literally “spotted fever”) and Sister Margarete’s harrowing description of “the Louse,” which she blames for the deaths of her fellow nurses. This desperate, disease-ridden, and logistically strained environment forms the backdrop for the primitive and improvisational medicine that defines Lucius’s wartime experience.