After the partition of India, Hyderabad State, a princely state under the rule of the Nizam of Hyderabad, chose to remain independent. The following stand-off between the Government of India and the Nizam ended on 12 September 1948, when India's then Deputy Prime Minister Sardar Vallabhbhai Patel ordered Indian troops to secure Hyderabad State. During five days of fighting, the Indian Army, backed by an Indian Air Force squadron of Hawker Tempest aircraft, routed the Hyderabad State forces. Five Indian Army infantry battalions and one armoured squadron were engaged in the operation. The following day, Hyderabad was proclaimed part of India. Major General Joyanto Nath Chaudhuri, who led the operation, and accepted the surrender of the Nizam's forces on 18 September 1948, was appointed the military governor of Hyderabad, to restore law and order, and served until 1949.