The Warring States Period (475–221 BC) was an era of division in ancient China. After the relatively peaceful and philosophical Spring and Autumn Period, various states were at war before the Qin state conquered them all, and China was reunited under the Qin Dynasty.
        
             
        
        
        
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Between 70,000 and 100,000 years ago, Homo sapiens began migrating from the African continent and populating parts of Europe and Asia. They reached the Australian continent in canoes sometime between 35,000 and 65,000 years ago.
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The 13th colonies were afraid the British Navy were surrounding them.  
        
             
        
        
        
Answer:Características como la migración de personas, las invasiones, la distribución de la población y la desurbanización caracterizaron este período. La edad medieval tuvo tres períodos, que incluyen la antigüedad, los períodos medievales y el período moderno, todos los cuales exhibieron características diferentes.
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