By the end of the third century BC, most of North India was knit together in the first great Indian empire by Chandragupta Maurya. His son Bindusara extended the Mauryan empire over virtually the entire subcontinent, giving rise to an imperial vision that was to dominate successive centuries of political aspirations. The greatest Mauryan emperor was Ashoka (286-231 BC) whose successful campaigns culminated in the annexation of Kalinga.
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