People of the Revolution and the USSR
- Francisco Largo Caballero Francisco Largo Caballero The UGT worker-leader they called the Spanish Lenin, a prime minister broken between revolution and war
- Julián Besteiro Julián Besteiro PSOE right-wing leader, Speaker of the Cortes; joined Casado's coup, refused exile, and died in Franco's prison
- Andreu Nin Andreu Nin The Marxist who linked the Russian and Spanish revolutions, founder of the POUM
- Juan Negrín Juan Negrín The physiologist trained in Leipzig who sent the Republic's gold to Moscow and chose to fight to the end as its last prime minister
- José Díaz José Díaz From baker to General Secretary: the leader who steered Spanish communism through the Popular Front and Civil War
- Dolores Ibárruri Dolores Ibárruri “¡No pasarán!”: the voice of anti-fascism that refused to let Franco's armies pass
- Joaquín Juliá Maurín Joaquín Maurín A revolutionary who pursued workers' unity across communist divisions
- Santiago Carrillo Santiago Carrillo The Eurocommunist architect who lit a cigarette at gunpoint
- José Ramón Álvarez Fernández José Ramón Fernández Álvarez Cuban revolutionary commander credited with defeating the 1961 Bay of Pigs landing (Brigade 2506)