British manufactured aircraft saw service with multiple Entente Powers during the Great War including the American US Army Air Service, Belgian Military Aviation Service, and the Armée de l'Air (French Air Force).
French manufactured aircraft saw service with multiple Entente Powers during the Great War including the United States Army Air Service.
Italian manufactured aircraft saw service primarily with the Corpo Aeronautico Militare (Italian Military Aviation Corps) and limited service with both the British and American forces during the Great War.