Definition: Porus, king of the area between the Hydaspes and the Acesines rivers, in India, met Alexander the Great at the Battle of the Hydaspes River in June 326 B.C. Porus brought war elephants with him that terrified the Greeks and their horses. In time, Alexander's troops gained the upper hand and the elephants stampeded their own troops. King Porus surrendered to Alexander.
It was during this battle that Bucephalus was killed.
