Internationalist organization founded in Liège in 1930 that would regroup the founding current of the Spanish Communist Party (PCE in Spanish) of 1920 and would join the International Left Opposition as its Spanish section. It would inspire the communist lefts of Argentina, Uruguay and Chile.
Brief history of the Spanish communist left
In 1930, a group of Spanish migrant and exiled workers in Liège (Belgium) formed the "Spanish Communist Organization" (OCE in Spanish) around Francisco García Lavid ("Henri Lacroix"). The OCE would grow rapidly, regrouping the founding current of the PCE (Esteban Bilbao, Juan Andrade), of the Red International of Labor Unions (Nin) and a new generation of militants who joined already under the banners of the International Communist Left (Fernández Grandizo -"Munis"-, Félix Galán, Luís Rastrollo -"SEM"-, etc.). The OCE would take part in founding the Spanish section of the International Left Opposition and would change its name in 1932 (2nd National Conference) to "Spanish Communist Left" (ICE in Spanish).
In 1935, the ICE split into two tendencies: the one that gave priority to remaining within the International Opposition (Bilbao, Fersen, Munis) and the majority that, under the influence of Andrade and Nin, chose to merge with the centrist and regionalist Catalan group BOC to gain critical mass, forming the POUM.
After the split, the current was rebuilt around the minority that remained in the International Left Opposition (the "Bolshevik-Leninist Group"). They would be the only Marxists in Spain to take a clear stand for the revolution, fighting at the same time in the militias against Franco and confronting the Republican state alongside the workers in the May Days of 1937. In 1938 they would join the Fourth International as its Spanish section and, from 1942 onwards, would form the nucleus of its internationalist left.