Who is known as the "Iron Man of India"?

Sardar Vallabhbhai Patel is commonly known as the "Iron Man of India." He played a pivotal role in the integration of princely states into the newly independent India after the partition in 1947. As the first Deputy Prime Minister and Minister of Home Affairs, Patel used his diplomatic skills and determination to unite over 560 princely states and regions into a single nation. His efforts and leadership were instrumental in maintaining the territorial integrity and unity of India during a critical period in its history.