There's also the thought about air-superiority. With the huge formations over Europe virtually daily, and the masses of con-trails, but with the USAAF having the 'upper hand', it was thought that camouflage paint was unneccessary. However, after some units moved on to the Continent after D-Day, some aircraft received a coat of camouflage paint on their uppersurfaces, not for concealment in the air, but on the ground, in case of attack on the airfields.