While World War I nose art was usually embellished or extravagant squadron insignia, true nose art appeared during World War II, which is considered by many observers to be the golden age of the genre, with both Axis and Allied pilots taking part. At the height of the war, nose-artists were in very high demand in the USAAF and were paid quite well for their services while AAF commanders tolerated nose art in an effort to boost aircrew morale. The U.S. Navy, by contrast, prohibited nose art, while nose art was uncommon in the RAF or RCAF.