Hyderabad Liberation Day is observed on September 17 in honour of the martyrs of the Hyderabad Liberation Movement.
Hyderabad did not get independence for 13 months after India's independence on August 15, 1947, and was under the rule of the Nizams.
The region was liberated from Nizam's rule on September 17, 1948, after a police action namely 'Operation Polo'.
When India gained independence, the Razakars called for Hyderabad state to either join Pakistan or to become a Muslim dominion while resisting its merger with the Union of India.
The people of the region fought valiantly against the atrocities of the Razakars to merge the region into the Union of India.
The Razakars, a private militia, had committed atrocities and defended the erstwhile Nizam rule in Hyderabad.
On September 17, 1948, the then Hyderabad state, which was
under the rule of the Nizams, was annexed into the Union of India following
military action, initiated by the then Home Minister Sardar Vallabhbhai Patel.