The Maurya Empire . it was first founded by Chandragupta Maurya c. 320 BCE, after conquering the Nanda Empire when he was only about 20 yrs. old.

Chandragupta extended the border of the Maurya Empire towards Seleucid Persia after defeating saeucus c.305 BCE.

Chandragupta extended the borders of the empire southward into the Deccan Plateau c. 300 BCE.

Ashoka the Great extended into Kalinga during the Kalinga war c. 265 BCE , and established superiority over the southern kingdoms.
