alternate history, Kaiserreich universe, Hearts of Iron IV, military uniforms, German Empire soldiers, Iron Cross medals, 1930s fashion, trench warfare, biplanes, zeppelins, tanks, artillery, European battlefields, strategic maps, propaganda posters, diesel-punk aesthetics, sepia tones, dynamic lighting, dramatic shadows, fog of war, immersive atmosphere, detailed textures, historical accuracy, steampunk elements, industrial structures, political intrigue, faction symbols, grand strategy game, complex mechanics, global tension, alliance system, immersive storytelling, full-body shot, isometric view, ambient occlusion.