Hyderabad Liberation Day is observed on September 17th each year. It commemorates the day when the Indian state of Hyderabad was liberated and integrated into the Indian Union in 1948.
Before its integration into India, Hyderabad was one of the largest princely states in India, ruled by the Nizam, who was the monarch. When India gained independence from British colonial rule in 1947, the princely states were given the option to join either India or Pakistan or remain independent. The Nizam of Hyderabad, Mir Osman Ali Khan, initially wanted to keep Hyderabad as an independent state, which led to tensions with the Indian government.
The situation escalated, and in September 1948, the Indian government launched a military operation known as "Operation Polo" to annex Hyderabad and bring it into the newly independent India. The operation resulted in the surrender of the Nizam's forces, and Hyderabad became a part of the Indian Union on September 17, 1948.
Hyderabad Liberation Day is celebrated in the state of Telangana, of which Hyderabad is now the capital, as a day to remember and honor the integration of Hyderabad into the Indian Union and the end of the princely rule. It signifies the importance of preserving the unity and integrity of the newly independent India.