King Porus ruled the Pauravas, an ancient Indian kingdom situated between the Hydaspes (Jhelum) and Acesines (Chenab) rivers in the Punjab region of ancient India. He is primarily known for his courageous defense against Alexander the Great's invasion of India.
At the Battle of the Hydaspes (326 BC), Porus led his army, which famously included a formidable contingent of war elephants, against Alexander's Macedonians. Despite a fierce resistance and initial success with his elephants, Porus was ultimately defeated due to Alexander's superior tactics.
Impressed by Porus' bravery and dignity, Alexander allowed him to continue ruling his kingdom, and even expanded his territories. Porus remained loyal to Alexander until the latter's death.