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
Nemrut (volcano) many measurements and observations. He also suggested possible ways of the evolution of Nemrut, most of which were confirmed later. In the 20th century, the scientific study of the volcano was interrupted by the political instability in the region. In the first half of the 20th century Nemrut was wrongly classified as an extinct volcano. Only in the 1980s, with the resumption of the studies, its status was changed to dormant. Currently Nemrut is mainly studied by Turkish volcanologists. The volcano is still poorly understood, and there is no consensus on the interpretation of stratigraphic data. Analysis of the sediments