Argentinean Che Guevara, 1928-1967, was educated as a physician at the University of Buenos Aires.
Guevara proved to be an able and resourceful leader, and rose to become Castro's chief lieutenant after the rebel invasion of Cuba in 1956.
Though he was a lifelong anti-capitalist, he served as president of the national bank in Cuba. As the quintessential anti-American, he played a big role in severing ties with the United States.
He later served as minister of industry, from 1961 to 1965.
The shoes of an administrator were an uncomfortable fit for him; revolutionary activity remained his first love, so in 1965 he left Cuba to foment revolution wherever he could -- notably in the Congo and also in Bolivia, where he was eventually captured and executed by government troops.