Probably the most elegant, but in any case the most powerful French fighter of World War II was the Dewoitine D.520. At first, it did not look nearly as good and the French Air Force command was not interested in it. But that was to change.
Due to the government's laziness, the most powerful French fighter got into production late. At the beginning of World War II, the units received only the first few pieces. After the defeat of France, the D.520 flew on various battlefields, under various insignia, on the side of the Axis and against it, against the Allies and on their side.
In the second half of the Spanish Civil War, the armament of the fighter component of the Republican Air Force relied almost exclusively on the Soviet Polikarp I-15 and I-16. Other types of single-seat fighters were usually available in only a few copies and served outside the main combat areas, mainly to cover the long Mediterranean coast. These included the French Dewoitine D.371 high-altitude fighters.