The Communist Organization of Spain (Bandera Roja) (Spanish: Organización Comunista de España (Bandera Roja), Catalan: Organització Comunista d'Espanya - Bandera Roja; OCE-BR), commonly known as Bandera Roja (red flag) was a Maoist communist party in Spain.

OCE-BR was founded in 1970 as a split of the PSUC by a sector of its youth wing.

The splitters, led by Joan Oms i Llohis, founded the Communist Collective of Catalonia.

In 1989 OCE-BR joined the PSUC again, finally disappearing as an organization in 1994.

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