This text book “History of Haryana: Ancient, Medieval and Modern Period” is a narrative of resilience, cultural amalgamation, and socio-political transformations that have shaped its identity over the ages. Haryana is a home to several sites from the Indus Valley Civilization, indicating its significance as a cradle of early civilization. In the epic Mahabharata, Haryana is referred to as the Bahudanayak Region. Haryana has been ruled by a multitude of native and non-native polities, including the Maurya Empire, Gupta Empire, Pushyabhuti, Delhi Sultanate and Mughals. The Sikh rulers also ruled parts of Haryana, including regions like Jind, Kaithal, and Hisar. Notable battles like the Battles of Tarain, Battles of Panipat, and Battle of Karnal took place in Haryana, shaping its historical narrative. During the British colonial period, Haryana played most important role in the Rebellion of 1857 and also during the national movement until the independence of India. Influential figures like Lala Lajpat Rai and Sir Chhotu Ram played pivotal roles in social reforms and the Indian independence movement, leaving a lasting impact on Haryana’s legacy.