The Romanian Air Corps or Aviation Corps (RAC) (Romanian: Corpul de Aviație) was the air arm of the Romanian army until the formation of the Romanian Air Force. It was established on 1 April 1913 as the Military Aeronautics Service (Serviciul de Aeronautică Militară) and subordinated to the Engineer Inspectorate, being organized in two branches – the aviation and the balloon branch. On 23 August 1915, the RAC was formed as an independent military arm and operated until 1 January 1924 when it became an equal to the Army and Navy, being redesignated as the Royal Romanian Air Force (Aeronautica Regală Română).