File:Twentieth Air Force - Emblem.pngForce Source Image provided by HQ, AFSPC/PAC [1] Author en:United States Army Institute of Heraldry Other versions USAAF patch: Image:20th usaaf.png
File:20th Aero Squadron - Emblem.pngDescription20th Aero Squadron - Emblem.png English: 20th Aero Squadron - Emblem Date 1917 Source scan of USAAF patch Author United States Army Air Service