On most combat airplanes, they have a country insignia on the wing. My question is what was the French insignia in World War II?
Also, we have a skin on the P40 that has a blue circle with a white star and a red circle inside of the star, was this just another American insignia?
At various stages of WW2 the US national insignia changed, first there was the blue roundel with the with star with the red ball in the middle of the star. I believe they changed that because of the Japanese meatball resembling it so they eliminated the red ball and the insignia became just a white star inside a larger blue one. At one point they put a yellow circle around the blue circle signifying a specail operation in North Africa called "Operation Torch". The insignia then had the 2 rectangle bars placed on either side and had a red outline around the entire insignia. Later they removed the red out line all together. After WW2 they then put a blue outling around the insignia and then I believe in 1947 when the army air corp became the United states Air Force they added the redbars in the middle of the side bars.
I think that all army air corp planes also had "US Army" painted across the bottoms of their wings up until the transition to the insignia with the side bars. Hope this helps.