Workers' Party of Marxist Unification

The '''Workers' Party of Marxist Unification (, POUM'''; , POUM) was a Spanish communist 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 () and the Workers and Peasants' Bloc (BOC, affiliated with the Right Opposition) against the will of Leon Trotsky, with whom the former broke.

==Formation== In 1935, POUM was formed as a communist opposition to the Stalinist form of communism promoted by the Soviet Union, by the revolutionaries Andreu Nin and Joaquín Maurín. Nin was profoundly influenced by the thinking of Leon Trotsky, particularly his permanent revolution thesis. It resulted from the merging of the Communist Party's Left Opposition (the Trotskyist Communist Left of Spain) and the Right Opposition (the Workers and Peasants' Bloc). This alliance was against the wishes of Trotsky, with whom the Communist Left of Spain broke. In his writings on the Spanish Revolution, Trotsky would elaborate on his criticisms of the POUM such as their abandonment of the Left Opposition program in favour of reformism to retain tactical advantage among other political tendencies.