Jeune Nation (; English: Young Nation) was a French nationalist, neo-Pétainist and neo-fascist far-right movement founded in 1949 by Pierre Sidos and his brothers. Inspired by Fascist Italy and Vichy France, the group attracted support from many young nationalists during the Algerian war (1954–62), especially in the French colonial army. Promoting street violence and extra-parliamentarian insurrection against the Fourth Republic, members hoped the turmoils of the wars of decolonization would lead to a coup d'état followed by a nationalist regime. Jeune Nation was the most significant French neo-fascist movement during the 1950s, gathering at its height 3,000 to 4,000 members.