Usurpation of Qi by Tian

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The usurpation of Qi by Tian (Chinese: 田氏代齊) was the deposition of the Jiang (姜) clan as rulers of the state of Qi, and their replacement by members of the Tian (田) clan. That occurred as a series of events between 481 and 379 BCE through which the Tian clan cemented its position as the leading family in Qi.

The final acts of the usurpation (391–379 BCE), in conjunction with the Partition of Jin (453 BCE or 403 BCE), mark the transition from the Spring and Autumn period to the Warring States period.

The Tian clan continued to use the name "Qi" for its realm after the usurpation. For historiographical purposes, pre-usurpation Qi is referred to as "Jiang Qi" (姜齊), and post-usurpation Qi is referred to as "Tian Qi" (田齊).