Jeju uprising to Jeju from Busan and deploying police companies, each 1,700 strong, from the southern provinces of the mainland. The guerrillas retreated to their bases in the forests and caves around Hallasan, an extinct volcano and the highest mountain in South Korea. On April 29, the Korean, non-military, governor of Jeju province abandoned his post, defected, and joined the guerrillas. This caused many police officers, disillusioned by the atrocities they were ordered to commit against their own, to do the same. In response, U.S. military provincial governor William F. Dean ordered a purge of SKLP sympathizers from the ranks of the
Rincón de la Vieja Volcano Rincón de la Vieja Volcano Rincón de la Vieja (from Spanish, "Corner of the Old Woman") is an active andesitic complex volcano in north-western Costa Rica, about 23 km from Liberia, in the province of Guanacaste. Its name means "The Old Woman's Corner", a reference to a local legend about a girl whose lover was thrown into the crater by her father; she became a recluse living on the mountain, and was credited with powers of healing. Rincón de la Vieja stands above sea level, and its summit is the highest point in Rincón de la Vieja Volcano National Park.