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
Wonchi (volcano) Wonchi (volcano) Wonchi is a volcano located west of Addis Ababa, Ethiopia. At above sea level, it is the highest volcano in Ethiopia, from Mount Dendi, Ethiopia's second highest volcano. Wonchi is located at equal distance between the towns of Ambo and Woliso. The volcano has a wide caldera, and a single crater lake, Wonchi lake, about below the rim of the volcano. Study of Wonchi's caldera is incomplete; initial findings show it could be as much as deep, and the lake itself could be as deep as . Besides Wonchi lake, the caldera also contains hot springs, waterfalls, valleys,