Forming an alliance with Cao, Wey, and Zou, Duke Xiang and his troops invaded Qi and eventually defeated Prince Zhao's rival brothers, crowning him as "Duke Xiao of Qi".

[2] With his influence on the rise, Duke Xiang saw a chance to become the next hegemon of China and made war with Chu.

In the Battle of Hongshui (泓水之戰) against the much stronger and fully prepared enemy, Duke Xiang's troops were defeated thoroughly and he himself was badly hurt.

He died in the following year and was succeeded by his son Wangchen known as Duke Cheng of Song.

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