Around 320 A. D what united much of India. *

Gupta Empire expansion

Explanation:

Samudragupta succeeded his father, Chandragupta I, in 335 CE and ruled for about 45 years. ... Gupta Empire, 320-600 CE. The Gupta Empire expanded through conquest and political alliances until 395 CE, when it extended across the entire Indian subcontinent.

answeramicable; (friendly);