Acronym for Ethnikí Organósis Kipriakóu Agónos (National Organization of Cypriot Struggle) an underground organization formed by General George Grivas 1955 to fight for the independence of Cyprus from Britain and ultimately its union (enosis) with Greece. In 1971, 11 years after the independence of Cyprus, Grivas returned to the island to form EOKA B and to resume the fight for enosis, which had not been achieved by the Cypriot government.