A demand has been raised to include September 17, Hyderabad Liberation Day, in Telangana's school textbooks. The day marks Hyderabad's integration into the Indian Union in 1948 after Operation Polo. The seventh Nizam, Mir Osman Ali Khan, did not initially accede to India after Independence. A Standstill Agreement was signed on 29 November 1947, but tensions and violence grew. Operation Polo began on 13 September 1948 and Hyderabad State Forces surrendered on 17 September 1948. Hyderabad State was reorganised in 1956, and Telangana became a separate State on 2 June 2014.