- Sardar Vallabhbhai Patel = Iron Man of India = Architect of Political Integration.
- Think of "Iron" as a metaphor for his unyielding strength and iron will in binding 562 autonomous princely states into a single sovereign Union.
Sardar Vallabhbhai Patel is called the "Iron Man of India" for his decisive role in integrating over 560 princely states into the Indian Union after independence. Answer: Sardar Vallabhbhai Patel