French military aviation was born in 1909. After the approval of the law by the French National Assembly on March 29, 1912, French Military Aeronautics became officially part of the French Army, alongside the four traditional branches of the French Army, the infantry, cavalry, artillery and engineers. France was one of the first states to start building aircraft. At the beginning of First World War, France had a total of 148 planes (8 from French Naval Aviationand 15 Airships. By the time of the armistice in November 1918, 3608 planes were in service. 5,500 pilots and observers were killed from the 17,300 engaged in the conflict, amounting then to 31% of endured losses.