Why is sardar vallabhbhai Patel called Bismark of India?

Sardar Vallabhbhai Patel is often referred to as the "Bismarck of India" due to his role in unifying the diverse princely states of India into a single nation after independence, akin to how Otto Von Bismarck unified Germany in the 19th century. Patel's strong leadership, political acumen, and strategic negotiations were instrumental in integrating over 500 princely states, ensuring political stability and national integrity. His relentless pursuit of unity and his vision for a cohesive India earned him this comparison to the German statesman.