Haryana came into existence in 1966 when it was separated from Punjab to be declared as a separate state. It is known as the land of the Bhagvad Gita and the great epic Mahabharata. It is believed that Kurukshetra was the setting of the 18days war in Mahabharata. As per the various excavations in many parts of Haryana proved that the city existed even before the Harappan civilization. Among the world's oldest and largest ancient civilizations, the Indus Valley Civilization sites at Rakhigarhi village in Hisar district and Bhirrana in Fatehabad district are 9,000 years old. Rich in history, monuments, heritage, flora and fauna, human resources and tourism with well developed economy, national highways and state roads, it is bordered by Himachal Pradesh to the north-east, by river Yamuna along its eastern border with Uttar Pradesh, by Rajasthan to the west and south, and Ghaggar-Hakra River flows along its northern border with Punjab. Since Haryana surrounds the country's capital Delhi on three sides (north, west and south), consequently a large area of Haryana is included in the economically-important National Capital Region for the purposes of planning and development.