On September 13, 1948, a historic military action—Operation Polo—reshaped India’s political map. This swift operation marked the annexation of Hyderabad, ending the rule of the Nizam and ensuring that one of India’s largest princely states became an integral part of the Indian Union.
The Background: A Princely State’s Defiance
When India gained independence in 1947, over 500 princely states were invited to accede to either India or Pakistan. Most rulers agreed quickly, but Hyderabad, the richest and most populous princely state, resisted.
- Nizam Mir Osman Ali Khan sought complete independence.
- Communal tensions escalated, stoked by the Razakars, a paramilitary group loyal to the Nizam.
- Violence and lawlessness threatened the fragile peace of newly independent India.
India’s Deputy Prime Minister Sardar Vallabhbhai Patel, the “Iron Man of India,” was determined that Hyderabad could not remain independent in the heart of the country.
Operation Polo Unfolds
At dawn on September 13, 1948, the Indian Army launched Operation Polo, named after the Nizam’s favorite sport.
- About 40,000 Indian soldiers advanced into Hyderabad.
- Hyderabad’s forces—around 25,000 troops and the Razakars—were poorly trained and disorganized.
After five days of intense yet strategic fighting, the Nizam surrendered on September 17, 1948, paving the way for the state’s formal accession to India.
Aftermath and Transition

Despite the conflict, the Indian government allowed the Nizam to remain as Rajpramukh (Governor) of Hyderabad until 1956, ensuring a relatively peaceful political transition.
However, reports of civilian casualties and communal violence remain part of the historical debate, highlighting the complex realities of integration.
Legacy of a Powerful Turning Point
Operation Polo was more than a military success—it was a defining moment in India’s nation-building:
- It secured the country’s territorial integrity.
- It strengthened the concept of a unified, secular India.
- It reinforced Patel’s reputation as the architect of modern India’s unity.
Today, September 17 is celebrated as Hyderabad Liberation Day in parts of India, but *September 13 stands out as the decisive day when the operation began.
Why It Matters Today
The annexation of Hyderabad through Operation Polo teaches enduring lessons:
- Strong leadership is essential for national unity.
- Diplomacy and decisive action can coexist to shape a nation’s destiny.
- Integration of diverse regions is critical to a country’s stability.
This Day in History: September 13, 1948 reminds us that forging a united India required courage, strategy, and the unyielding resolve of leaders like Sardar Patel.

