The documentary states that by 1944, weekly attendance at cinemas in the USA had increased from 55 million in 1941 to 100 million in 1944, maintaining that by 1944, two thirds of the nation went to the pictures every week.
This documentary reports that two months after Italy surrendered in World War II, the Hollywood WW 2 movie Sahara (1943) was released with an Italian as a principal character - and a good guy. This was J. Carrol Naish playing Giuseppe in Sahara (1943).
Going Hollywood: The War Years (1988) maintains that by the end of 1942, nearly six million men and women of the United States of America were in military service, about three quarters of these were serving at home on the home front in defense related jobs whilst about a quarter of them were fighting overseas.
Going Hollywood: The War Years (1988) states that many Japanese characters in films of the World War II period were actually played by Chinese actors. This was because 112,000 Japanese-Americans, who had lived in the USA for years, were transferred to relocation centers and "stripped of their property" during WW 2.
This documentary shows many clips from Hollywood World War II movies, as the DVD / video sleeves for it state, its a "lively compilation" of vintage feature-film clips and "original wartime footage". But virtually all of them are not annotated with a movie's title (only with actors' and/or actresses' names), nor is a list of the titles shown during the closing credits, making it possibly difficult for the viewer to know which film is which unless they know the movie.
For Thirty Seconds Over Tokyo (1944), according to this doc, the MGM studio recreated the section of an air craft carrier flat top on a sound stage large enough to fit four genuine B25 planes whilst a whole sixty foot miniature was also built, placed in the studio tank doubling as the ocean. Moreover, this special effects Academy Award winning movie utilized model planes, hydraulic jacks, wires, motors, pulleys, and a miniature model of Tokyo used to show the bombing of that city with mini explosions.
According to the article "On the Battlefront" by Clyde Jeavons in the film history tome 'The Movie', " . . . out of approximately 1700 features produced between 1942 and 1945 over 500 about 30%] were war films of one kind or another."