Sous lieutenant Louis Prosper Gros (24 July 1893 – 3 March 1973) became a flying ace during World War I, scoring eight confirmed aerial victories, and possibly a ninth.

When World War I began, he was serving as an enlisted Brigadier (equivalent to Corporal) in the artillery.

On 22 October 1916, he was posted to Escadrille HF41 (the 'HF' denoting the squadron's use of Henri Farman observation aircraft).

While with this squadron, he scored his first win on 13 April 1917, won the Médaille militaire[a] on 5 May 1917, and was promoted to Adjutant on 5 November 1917.

[2][b] Louis Prosper Gros continued to fly following the war, amassing some 3,500 flight hours.