Which battle happened first, Battle of the Ch'ongch'on River or  Battle of Stones River?
Battle of the Ch'ongch'on River The Battle of the Ch'ongch'on River, also known as the Battle of the Ch'ongch'on () or the Second Phase Campaign Western Sector (), was a decisive battle in the Korean War, and it took place from November 25 to December 2, 1950, along the Ch'ongch'on River Valley in the northwestern part of North Korea. In response to the successful Chinese First Phase Campaign against the United Nations forces, General Douglas MacArthur launched the Home-by-Christmas Offensive to evict the Chinese forces from Korea and to end the war. Anticipating this reaction, the Chinese People's Volunteer Army Commander Peng Dehuai planned a counteroffensive, dubbed the "Second Phase Campaign", against the advancing UN forces.
Battle of Onjong The Battle of Onjong (Korean: 온정리 전투 ), also known as the Battle of Wenjing (), was one of the first engagements between Chinese and United Nations forces during the Korean War. It took place around Onjong in present-day North Korea from October 25 to October 29, 1950. As the main focus of the Chinese First Phase Campaign, the Chinese 40th Corps conducted a series of ambushes against the Republic of Korea II Corps, effectively destroying the right flank of the United States Eighth Army while stopping the UN advances north toward the Yalu River.