United Kingdom / United States — 2 museum-grade prints drawn from its heritage. Lewis Gun (WWI, United Kingdom / United States) — widely used by British Empire forces; served as infantry and aircraft gun; recognisable cylindrical cooling jacket. Wallimilist Forgotten Weapons prints are independent military history tribute art; not affiliated with any manufacturer or government agency. The Spitfire Mk IX, P-51D Mustang, and F-86 Sabre represent three eras of Western fighter aviation — British piston defence, American long-range escort, and the first generation of swept-wing jet superiority in Korea. The poster's Sortie Legend framing treats each airframe as a milestone rather than a squadron-specific documentation sheet, which is why the copy stays at operator and year level while the illustrations carry the recognisable roundels, nose art, and tail markings visible in each panel.