Who was the first Indian empire

Greek empire of Alexander the great

Chandragupta, also spelled Chandra Gupta, also called Chandragupta Maurya or Maurya, (died c. 297 bce, Shravanbelagola, India), founder of the Mauryan dynasty (reigned c. 321-c. 297 bce) and the first emperor to unify most of India under one administration.