During the World War II and immediately after it, in addition to the many private films created to help the war effort, many Allied countries had governmental or semi-governmental agencies commission propaganda and training films for home and foreign consumption. Animated films will be reserved for a future list.
The United States had the largest film industry of any of the Allied powers, and its use for propaganda purposes is legendary. Because it was so big, there was no single governmental or semi-governmental agency that centrally controlled it. Instead, the Office of War Information co-ordinated efforts among many entities to produce propaganda: