Foreign volunteers fought on behalf of General Franco and the Nationalists in the Spanish Civil War for a right-wing cause whose aim was to smash democracy. These assorted adventurers, fascists, and Catholic crusaders were on the winning side, but their role has remained strangely hidden until now. Men from Portugal and Morocco signed on for money and adventure. General Eoin O'Duffy organised 700 Irishmen in a modern Crusade; 500 Catholic Frenchmen fought in the "Jeanne D'Arc" unit; and thirty British volunteers, including aristocrats and working-class fascists, also took up arms. Romanian...