Did You Know? A Brief History of U.S. Air Force Uniforms When the U.S. Air Force became an independent branch in 1947, it did not immediately have its own uniforms. Airmen Simple A Line Deep V Neck Royal Blue Long Prom Dress with Split PSK466 US8 Royal Blue Air Force Blue Trousers A Line Halter V Neck Backless Royal Blue Prom Dresses with High Slit, morievent GREEK BLUE LIZARD AF PANTS Constitutional Republic Supply