Claim: Albert Louis Deullin served in the French military and was a World War I flying ace through World War I; he died in a flying accident while testing a prototype of a new airplane in his post-war role as a chief-pilot of an aerial company.
Evidence: Capitaine Albert Louis Deullin (24 August 1890 – 29 May 1923) was a French World War I flying ace credited with twenty aerial victories. He joined the French military and was a non-commissioned officer on inactive status from the Dragoons by October 1912. Albert Deullin died in a flying accident at Villacoublay on 29 May 1923. He was testing a prototype of a new airplane. Deullin became a pioneer of french commercial aviation by becoming the chief-pilot of aerial company franco-roumaine, employing many veterans pilots from former GC 19. Flying old Salmson 2A2 from military surplus, the company opened aerial lines from Paris to eastern European cities, including Istanbul. In 1923, the company flew on the early commercial airplanes such as the Caudron C.61.