The Battle of Onjong (Korean: 온정리 전투), also known as the Battle of Wenjing (Chinese: 温井战斗; pinyin: Wēnjǐng zhàndòu), was one of the first engagements between Chinese and South Korean forces during the Korean War. It took place around Onjong in present-day North Korea from 25 to 29 October 1950. During the Chinese First Phase Campaign, the People's Volunteer Army (PVA) 40th Corps ambushed and defeated elements of the Republic of Korea Army (ROK) II Corps near Onjong.
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