The document analyzes movie posters for war films from the 1940s to present. It finds that the posters consistently use certain conventions. They typically feature earthy, neutral colors to represent war being fought in natural settings. Over time, the colors became darker and more mysterious. The posters also transitioned from being fully hand-drawn in the 1940s to incorporating new technologies while maintaining a hand-drawn style. Additionally, the image usually dominates using rule of thirds, while the title appears at the top or bottom to direct viewer attention. Adhering to these poster conventions can help a new war film project align with audience expectations of the genre.