During Mu’s reign, the Zhou Dynasty was at its peak, and Mu tried to stamp out invaders in the western part of China and ultimately expand Zhou’s influence to the east. In the height of his passion for conquests, he led an immense army against the Quanrong, who inhabited the western part of China. His travels allowed him to contact many tribes and swayed them to either join under the Zhou banner or be conquered in war with his army. This expedition may have been more of a failure than a success, judging by the fact that he brought back only four white wolves and four white deer. Unintentionally and inadvertently, he thus sowed the seeds of hatred which culminated in an invasion of China by the same tribes in 771 BC. In his thirteenth year the Xu Rong, probably the state of Xu in the southeast, raided near the eastern capital of Fenghao. The war seems to have ended in a truce in which the state of Xu gained land and power in return for nominal submission.