After the war, he served as the Chief of the General Staff of the Yugoslav People's Army, before moving to the position of Minister of Foreign Affairs and spent the final years of his political career as Vice President of Yugoslavia.

He spent the rest of his life in Dubrovnik and was very outspoken against the Yugoslav Wars and the regimes of Franjo Tuđman and Slobodan Milošević.

[2] In 1931 Nacrt za jednu fenomenologiju iracionalnog (Outline for a Phenomenology of the Irrational) was published which he had co-written with Marko Ristić.

In Paris there was a center run by Comintern and headed by Josip Broz Tito, which was used to feed volunteers from the Balkans to the Republicans in the Spanish Civil War.

[3] In 1940, as a reserve officer in the Royal Yugoslav Army, Popović was mobilized and told by his Colonel to watch out for subversive activities within the regiment.

Taut and deliberately controlled by a sensitive and disciplined mind and power of will, Popovic was an intellectual soldier of outstanding talents, which were perhaps alien to his inner nature.

[3]Alongside dozens of other WW2 and Spanish Civil War veterans, Popović was among the founding fathers of the Partizan Belgrade football club in October 1945.

In this function he also conducted negotiations with the representatives of Western powers associated with the modernisation of the JNA during the conflict with the Soviet Union (i.e., Informbiro).