The Workers' Party of Marxist Unification (Spanish: Partido Obrero de Unificación Marxista, POUM; Catalan: Partit Obrer d'Unificació Marxista) was a Spanish communist political party formed during the Second Republic and mainly active around the Spanish Civil War. It was formed by the fusion of the Trotskyist Communist Left of Spain (Izquierda Comunista de España, ICE) and the Workers and Peasants' Bloc (BOC, affiliated with the Right Opposition) against the will of Leon Trotsky, with whom the former broke. The writer George Orwell served with the party and witnessed what he called the Stalinist repression of the movement, which would form his anti-authoritarian ideas in later life.
Read more about POUM: Formation, Position, Conflict With The Popular Front, International Links, Cultural References