Police action that was taken place to unite princely state Hyderabad into the Republic of India. It is known as ______.
Operation Polo was the code name given to police action that took place in September 1948 in which the Indian Armed Forces invaded the State of Hyderabad, annexing the state into the Indian Union. Operation Polo was led by home minister Sardar Vallabhai Patel and Major J.N. Chaudary.