Final answer:
Chandragupta came to his end when he concluded a treaty with Seleucus Nicator in 301 BCE, gaining significant territories and control over trade routes.
Explanation:
Chandragupta concluded a treaty with Seleucus Nicator in 301 BCE, establishing friendly relations between them. This treaty led to Seleucus conceding the Indus Basin and much of Afghanistan to Chandragupta, granting the Mauryan Empire control over trade routes to West Asia.
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