René Fonck manner of death natural causes
After the war
Fonck returned to civilian life after World War I, and published his war memoirs Mes Combats, prefaced by Marechal Foch, in 1920. The fame he got from the war allowed him to be elected Member of Parliament representing the Vosges from 1919 to 1924.During the 1920s, Fonck persuaded Igor Sikorsky to redesign the Sikorsky S-35 for the transatlantic race or Orteig Prize. On 21 September 1926, Fonck crashed on takeoff when the landing gear collapsed, killing two of his three crew members. Charles Lindbergh won the prize seven months later in 1927.
Fonck eventually returned to military aviation and rose to Inspector of French fighter forces from 1937 to 1939.
His inter-war contact with the likes of former World War I foe Hermann Göring and Ernst Udet cast a shadow upon Fonck's reputation during the German occupation of France, as did allegations of collaboration with the Nazis and the Vichy regime. On 10 August 1940, Vichy Foreign Minister Pierre Laval announced that Fonck had recruited 200 French pilots to fight on the Nazi side. However, the truth was more complicated. Marshal Philippe Pétain wished to exploit Fonck's relationship with Göring in order to meet Adolf Hitler. He ordered Colonel Fonck to talk to Göring. A meeting was planned at Montoire, but after discovering evidence about the pro-Nazi politics of Pierre Laval, Fonck tried to convince Pétain not to attend. Initially Pétain appeared to heed Fonck's advice, but for some reason he eventually decided to disregard Fonck's warnings and met Hitler at Montoire on 24 October 1940. Fonck's loyalties were thus questioned by the Vichy regime, and he returned home to Paris, where he was eventually arrested by the Gestapo and imprisoned in the Drancy internment camp.After the war, a French police inquiry about his supposed collaboration with the Vichy regime completely cleared Fonck. The conclusion was that his loyalty was proved by his close contacts with recognised resistance leaders such as Alfred Heurtaux during the war. He was awarded the Certificate of Resistance in 1948. The citation reads: "Mr. Fonck, René, a member of the fighting French forces without uniform, took part, in territory occupied by the enemy, to glorious fights for the liberation of the nation".
Fonck remained in Paris, but also frequently visited his native Lorraine, where he had business interests. 
He died of a stroke in his Paris apartment, Rue du Cirque, at the age of 59 and is buried in the cemetery of his native village of Saulcy-sur-Meurthe.
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