Yugoslav volunteers in the Spanish Civil War

There were four airmen among the volunteers, the most notable being fighter pilot Božidar "Boško" Petrović who attained the status of "flying ace."

After the war, those who managed to flee across the Pyrenees fell captive in internment camps in France, with many being repatriated illegally by the Yugoslav communist organisation.

Three former members of the International Brigades ended up commanding armies of the Yugoslav Partisans during World War II: Peko Dapčević (1913–1999), Kosta Nađ (1911–1986) and Petar Drapšin (1914–1945).

The rest were predominantly working class Yugoslavs who had emigrated elsewhere and then came to Spain from other countries, such as France (420), Belgium (191), the Soviet Union (84), Canada (83), the United States (57), and others.

Spanish sources say that out of 1,040 Yugoslavs on record some 561 self-described as communists, ten as social-democrats, eight were affiliated with the Croatian Peasant Party and four were anarchists.