Communist partisans in the Korean War

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Communist partisans were active before, during and after the Korean War in South Korea.

They are considered the remnants of the Korean People's Army of the Democratic People's Republic of Korea (DPRK), prior insurgents who had fought against the Republic of Korea (ROK) before the KPA invaded, as well as local civilians who supported the DPRK in the region that either the KPA or the partisans had occupied. They could be considered as belligerent forces behind the 38th parallel before the Korean War, behind the front lines during the Korean War, and behind the demilitarized zone after the Korean War.

By October 1950, the number of Communist guerrilla troops south of the thirty-eight parallel reached over 15,000.^[1] Following the defeat of the KPA at the Battle of the Pusan Perimeter, more than 10,000 KPA remnants and Communist partisans retreated to Jirisan, the second highest mountain in South Korea.^[2] The ROK deployed two divisions from October 1950 to May 1951 and with American aid destroyed the majority of the Communist partisans in Jirisan during multiple campaigns, with the final campaign, Operation Rat Killer, successfully destroying the insurgency in Jirisan.^[3]