Agence France-Presse “Antoine de Saint-Exupéry's Spanish civil war press pass found” https://www.theguardian.com/world/2016/jul/05/antoine-de-saint-exuperys-little-prince-author-spanish-civil-war-press-pass
Dated 16 April 1937 the media accreditation for the author of The Little Prince was issued by the bureau in charge of propaganda for the losing republican side in Spain’s civil war. All journalists who worked in republican territory were required to register with the department.
Saint-Exupéry was aged 36 at the time and he listed himself in the pass he filled out as being an aviator and “clerk” in what appears to be a mistaken translation into Spanish of ecrivain, the French world for writer.
Saint-Exupéry had listed his address in the Spanish capital as the Hotel Florida, where many writers who came to Spain to cover the war such as Ernest Hemingway and Martha Gellhorn*3 stayed.
The conflict pitted soldiers loyal to an elected Socialist-led government known as republicans against rebel nationalist troops under Gen Francisco Franco in his military uprising that ultimately toppled the government.
It was one of the first conflicts to be extensively covered by press around the world, especially by intellectuals who sympathised with the republican side.
Saint-Exupéry, a pioneering pilot of his era, covered the war in 1936 from Barcelona in north-eastern Spain for the French newspaper L’Intransigeant and then in 1937 for Paris-Soir.
*1:http://www.antoinedesaintexupery.com/ See eg. https://fr.wikipedia.org/wiki/Antoine_de_Saint-Exup%C3%A9ry https://en.wikipedia.org/wiki/Antoine_de_Saint-Exup%C3%A9ry https://ja.wikipedia.org/wiki/%E3%82%A2%E3%83%B3%E3%83%88%E3%83%AF%E3%83%BC%E3%83%8C%E3%83%BB%E3%83%89%E3%83%BB%E3%82%B5%E3%83%B3%EF%BC%9D%E3%83%86%E3%82%B0%E3%82%B8%E3%83%A5%E3%83%9A%E3%83%AA Mentioned in http://d.hatena.ne.jp/sumita-m/20080702/1215017909
*3:http://gellhornmartha.blogspot.com/ See eg. Petri Liukkonen “Martha Gellhorn (1908-1998)” https://greencardamom.github.io/BooksAndWriters/gellhorn.htm https://en.wikipedia.org/wiki/Martha_Gellhorn Mentioned in http://d.hatena.ne.jp/sumita-m/20110608/1307562917