
Yabghu who nearly reunited the Turkic khaganate.
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Tardu was appointed Yabghu (viceroy) of the western part of the First Turkic Khaganate by his father Ist
After the death of Taspar Qaghan, Tardu rebelled against the Eastern Turkic Khaganate, seeking to reunite the khaganate under his rule. This led to a prolonged civil war that devastated the steppe and weakened both sides.
Tardu led a major invasion of Sui China, besieging the capital Chang'an. The Sui emperor Yang Jian organized a successful defense, and Tardu was forced to retreat after suffering heavy losses, ending his threat to China.
Tardu died in exile after his failed campaign against China. His death ended the attempt to reunite the Turkic Khaganate, and the Western Khaganate fell into decline, eventually being absorbed by the Eastern Khaganate.
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