Battle of Yalu River
1904 CE.
Shown on the map at 40.191°, 124.526°.
The Battle of the Yalu River (Amnok River) lasted from April 30 to May 1, 1904 and was the first major land battle during the Russo-Japanese War. It was fought near Wiju (modern village of Sinuiju, North Korea) on the lower reaches of the Yalu River, on the border between Korea and China. Also known as the Yalu River Crossing Operation.
Text from the Wikipedia article Battle of the Yalu River (1904), licensed CC BY-SA 4.0.