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In page Chandragupta Maurya:

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According to Kaushik Roy, the Maurya dynasty rulers beginning with Chandragupta were "great road builders".[2] The Greek ambassador Megasthenes credited this tradition to Chandragupta with the completion of a thousand-mile-long highway connecting Chandragupta's capital Pataliputra in Bihar to Taxila in the north-west where he studied. The other major strategic road infrastructure credited to this tradition spread from Pataliputra in various directions, connecting it with Nepal, Kapilavastu, Dehradun, Mirzapur, Odisha, Andhra, and Karnataka.[2] According to Roy, this network boosted trade and commerce, and helped move armies rapidly and efficiently.[2]