Jeune Nation was a French nationalist movement founded by Albert Heuclin, and with members including Jean Marot, Jacques Wagner and the brothers Sidos, François Sidos (president of the movement), Jacques Sidos and Pierre Sidos (secretary general and later president).
In order to underline the credentials of the new movement Sidos chose the Celtic Cross, emblem of the historical French Popular Party and also according a legend about use by Charlemagne SS Waffen Division. The emblem of Jeune Nation was the Celtic cross, a "symbol of universal life", and an element of Christian imagery.
On the 22 October 1949, the movement was present for the first time at the siege of the Napoleonic area in rue du Cirque. On the 28 March 1950, it was officially declared to the Prefecture of Police. The group, which declared itself openly to be neo-fascist, attracted support from far right students as it explicitly rejected the nostalgic Petainisme that defined the far right in France in the immediate post-war era.
It was dissolved in 1958 during the Algerian War after a series of violent episodes. After its dissolution, it announced its merger with the OAS, with a joint name of the Nationalist Party and the same emblem.
The legitimate heir of the Jeune Nation movement is Œuvre française, created by Pierre Sidos during the events of May 1968.
Jeune Nation still exists, as an Internet site. After the dissolution of Œuvre Française and Jeunesses nationalistes on 24 July 2013, the site became active.