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Direct cause: The political and military status of the Zhou Dynasty declined, and the strength of the group increased. Root cause: The inevitable result of the Zhou Dynasty's feudal system.
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During the Spring and Autumn Period, the Zhou royal family declined. At the same time as the decline of the Zhou royal family, some vassal states became powerful. In order to seize more land, property and population, and strive to be the hegemon who dominates the world and dominates other countries, several large princes have fought a long-term war for hegemony.
The situation of hegemony in the Spring and Autumn Period then appeared.
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Because of the decline of the Zhou royal family, and the unbalanced political and economic development of the vassal states, some strong and some weak, the princes and kings wanted to compete for the land and the people, and the population of the vassal states to dominate the vassal states, and there was a annexation war between the vassal states.
Hope it can help you a little
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