This map is based on the Book "Indian Historical Quarterly, Volume-13" which is published by ASI (Archeological Survey Of India) based on various inscriptions and ancient Greecian and Indian texts. https://archive.org/details/dli.calcutta.06445/page/n421/mode/1up
On Concluding - The Mauryan Empire, founded by Chandragupta Maurya, was an important dynasty in Indian history. Chandragupta Maurya conquered Aria, Kamboj, Arachosia, and Gedrosia from Seleucus . Bindusara, Chandragupta's son, expanded the empire by capturing the Dakshinapatha . Ashoka, Bindusara's son, defeated Kalinga and expanded the empire further . In the Girnar Second Rock inscription, Ashoka mentioned some details about his empire .
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