Marque d'identification des aéronefs

Military aircraft insignia are insignia applied to military aircraft to identify the nation or branch of military service to which the aircraft belong. Many insignia are in the form of a circular roundel or modified roundel; other shapes such as stars, crosses, squares, or triangles are also used. Insignia are often displayed on the sides of the fuselage, the upper and lower surfaces of the wings, as well as on the fin or rudder of an aircraft, although considerable variation can be found amongst different air arms and within specific air arms over time. The first use of national insignia on military aircraft was before the First World War by the French Aéronautique Militaire, which mandated the application of roundels in 1912. The chosen design was the French national cockade, which consisted of a blue-white-red emblem, going outwards from center to rim, mirroring the colours of the French flag. In addition, aircraft rudders were painted the same colours in vertical stripes, with the blue vertical stripe of the tricolors forwardmost. Similar national cockades were designed and adopted for use as aircraft roundels by the air forces of other countries, including the U.S. Army Air Service. Of all the early operators of military aircraft, Germany was unusual in not using "round" roundels. After evaluating several possible markings, including a black, red and white checkerboard, a similarly coloured roundel, and black stripes, it chose a black "iron" cross on a square white field, as it was already in use on various flags and reflected Germany's heritage as the Holy Roman Empire. The Imperial German Army's mobilization led to orders in September 1914 to paint all-black Eisernes Kreuz (iron cross) insignia with wide-flared arms over a white field — usually square in shape — on the wings and tails of all aircraft flown by its air arm, then known as the Fliegertruppe des Deutschen Kaiserreiches. The fuselage was also usually marked with a cross on each side, but this was optional.