Complex sentence: Anarchists and the Workers' Party of Marxist Unification ("Partido Obrero de Unificación Marxista", POUM) were integrated into the regular army, albeit with resistance; the POUM was outlawed and falsely denounced as an instrument of the fascists.
Split into simpler sentences: Anarchists and the Workers' Party of Marxist Unification ("Partido Obrero de Unificación Marxista", POUM) were integrated into the regular army, albeit with resistance. The POUM was outlawed and falsely denounced as an instrument of the fascists.