Aleksandar Ranković was a Serbian and Yugoslav communist politician, considered to be the third most powerful man in Yugoslavia after Josip Broz Tito and Edvard Kardelj. Ranković was a proponent of a

Konstantin "Koča" Popović was a Serbian and Yugoslav politician and communist volunteer in the Spanish Civil War, 1937–1939 and Divisional Commander of the First Proletarian Division of the Yugoslav P