The greatest battle in the conflict between the Chinese and the Xianyun (Hsien-yün)
took place between the lower reaches of the Jing and Luo Rivers and the Wei River Valley.
The city of Hao (later re-named Xi'an) was the capitol city of the Western Zhou Dynasty.
The battle took place during the reign of King Xuan (Hsüan) of Zhou (reigned 827-782 BCE).
The names and borders of modern provinces of China have been drawn in for the purpose of orientation.