There were 3 Wars was fought on the land of Panipat.
1.The First Battle of Panipat (1526), between the Mughal Babur and the Delhi Sultan Ibrahim Lodi, resulting in a Mughal victory
2. The Second Battle of Panipat (1556), between the Mughal Akbar and Hemu - the Hindu ruler of north India from Delhi, resulting in a Mughal victory
3. The Third Battle of Panipat (1761), between the Durrani Empire of Afghanistan and the Maratha Empire, resulting in a Durrani victory
I think First Battle of Panipat has major impact of Indian history. Its established Mugal empire on India.