Sancheong–Hamyang massacre
The Sancheong and Hamyang massacre (Korean: 산청・함양 양민학살 사건, Hanja: 山清・咸陽良民虐殺事件) was a massacre conducted by a unit of the South Korean Army 11th Division during the Korean War. On 7 February 1951, 705 unarmed citizens in Sancheong and Hamyang, South Gyeongsang district of South Korea were killed.
Source: Wikipedia — Sancheong–Hamyang massacre (CC BY-SA 4.0)