Throughout the Civil War, the various Communist newspapers engaged in a massive propaganda campaign against the anarchists and the Workers' Party of Marxist Unification (POUM).

Péret, Low, and Breá joined the Workers' Party of Marxist Unification during the Spanish Civil War.

Spain - the Workers' Party of Marxist Unification (POUM)

Workers' Party of Marxist Unification (Spain)

The organization was set up by the Workers' Party of Marxist Unification (POUM), modelled after the Communist Party-led International Red Aid.

His letters to his family in Ireland reveal a growing sympathy for the anti-Stalinist Workers' Party of Marxist Unification (POUM).

He was a military ruler and member of the Party of Democratic Unification.

The Communists attack not only the CNT, they also arrest the Workers' Party of Marxist Unification (POUM) members.

He was responsible for orchestrating the arrest and summary execution of members of the Workers' Party of Marxist Unification (POUM).

Crook later expressed regret for his part in the deaths of innocent members of the Workers' Party of Marxist Unification (POUM).