Battle of Bach Dang River
938 CE.
Shown on the map at 20.844°, 106.632°.
At the Battle of Bạch Đằng River in late 938 near Hạ Long Bay in northern Vietnam, the military force of the Viet-ruled domain of Tĩnh Hải quân, led by Ngô Quyền, a Viet lord, defeated the invading forces of the Chinese state of Southern Han and put an end to the Third Era of Northern Domination (Chinese ruled Vietnam). It was considered the turning point in Vietnamese history.
Text from the Wikipedia article Battle of Bạch Đằng (938), licensed CC BY-SA 4.0.