September 1948: Princely State of Hyderabad, ruled by the Nizam dynasty merged into Indian Union after a military action ‘Operation Polo’. last Nizam Mir Osman Ali Khan is deposed.
1956: Erstwhile Hyderabad State is divided into three parts. Marathi speaking areas merged with Maharashtra, Kannada speaking areas went to Karanataka and Telugu-speaking region Telangana merged with Andhra and Rayalaseema to form Andhra Pradesh. Protests break out in Telangana from the day one demanding retention of its separate entity.
1969: Political and economic discrimination at the hands of Andhra dominated Government triggers a violent protest. Employees and students hit the streets. Clashes with the police leave 369 people dead all over the region. State comes under President’s rule.
1971: Telangana Praja Samiti of Marri Channa Reddy wins majority of the lok Sabha seats in Telangana region but merges itself with the Congress headed by Indira Gandhi.
2001: After remaining dormant for almost three decades, the demand for Telangana State is revived by K Chandrashekar Rao. An astute and firebrand politician Rao quits the TDP and launches Telangana Rashtra Samiti building it into a potent political force.
2009: Chief Minister YS Rajasekhara Reddy, who subdued the movement, dies in a helicopter crash. KCR goes on indefinite hunger strike in November.
December 9, 2009: Then Home Minister P Chidambaram announces launching of the process to form Telangana State to persuade a critical KCR to end his hunger strike. Announcement triggers a fresh political crisis as all the MlAs from Seemandhra region resign in protest forcing the Centre to go slow.
2010: Srikrishna Committee, set up by the Centre to go into the demand for Telangana State, rejects the demand on various grounds including the fear that Maoist rebels will find a foothold in the smaller State.
2013: It takes another four years of agitation and strike, resignations and electoral defeats to force the Congress to walk the talk.
July 2013: Congress Working Committee and Union Cabinet decide to start the process of formation of Telangana State. It sparks off a counter agitation in Seemandhra region against the Telangana State, as Seemandhra people fears a separate Telangana will hurt their economic interests.
December 2013: The Centre sends a draft Bill to Andhra Pradesh legislative Assembly for its opinion.
Jan 30, 2014: Andhra Assembly, dominated by Seemandhra members, rejected the AP State Reoganisation Bill by voice votes as Telangana members supported it.
February 2014: Centre nevertheless goes ahead with the legislation. Union Home Minister Sushil Kumar Shinde introduced the AP State Reorganisation Bill in the lok Sabha on February 13. The lower House passed the Bill by voice votes on February 18. After many turn and twists the main Opposition BJP also comes in support of the Bill.
Feb 21, 2014: Rajya Sabha also passed the Bill clearing the way for carving out Telangana State. Andhra Pradesh comes under the President's rule as Chief Minister N Kiran Kumar Reddy resigns in protest against division of the State.
May 16, 2014: TRS emerges winner in the Assembly polls with a clear majority. Party chief KCR becomes the party’s Chief Minister-elect.
June 2: Telangana becomes the 29th State of Indian Union, President’s rule is revoked, Rao is sworn in as the first CM of the new State.