A line of warships executes a smoke-screening maneuver at sea, their funnels pouring dense black smoke skyward to obscure the fleet's position and movements, a tactic widely used by naval forces during the First World War and interwar period. This photograph, preserved in the personal collection of a Central American military officer linked to Nicaragua's U.S.-advised Guardia Nacional, offers a rare glimpse of the naval power and maritime training that shaped military professionalization in the region during the early twentieth century. Project: 218713