Sightings of massive freight trains hauling tanks across the United States have sparked online speculation—but the truth is far older and far more strategic. In this episode, we uncover why modern armies still rely on civilian railroads to move their most powerful weapons, blending into everyday freight traffic just as they have for nearly two centuries. From the first troop trains of 19th-century Europe to the American Civil War, World War II, and the Cold War, railroads quietly reshaped how wa