Explanation:

The First Battle of Panipat was fought on this day, April 21, in the year 1526 making a way for the Mughals, the mightiest power in the Indian history. The battle was fought between Babur's forces and Ibrahim Lodi's troops in Panipat. The battle marked the beginning of the Mughal era.
The Second Battle of Panipat took place in 1556, between the Mughal Forces of Akbar and the army of Hemu. The war was ultimately won by Mughal Forces. Bairam Khan with Akbar advanced through Thaneswar to the plain of Panipat, where thirty years earlier, Akbar’s grandfather, Babur had routed and slain Ibrahim Lodi. Himu lost his park of artillery in a preliminary engagement yet he faced his adversary with 15,000 war-elephants and a vast number of troops far superior in number to those of Akbar.
The third battle of Panipat was fought between the Afghans and the Marathas. The battle was significant as it marked the end of Maratha dominance in India. At the time of this battle Afghans were under the leadership of Ahmed Shah Abdali and the Marathas under the leadership of Peshwas had established control across Northern India. During the eighteenth century the parallel decline of Mughal Empire and defeat of Marathas in the battle of Panipat saw a new beginning of the colonial rule in India.
The main cause attributed towards the defeat of Marathas in the battle was the lack of allies due to their brutal behavior during the earlier years of reign. All important rulers including Sikhs, Jats, Kingdom of Awadh, Rajputs and many more were all upset with the treatment of Marathas towards them. The third battle of Panipat was fought in between Kaalaa Aamb and Sanauli road of present day. Both forces moved in lines, but intelligently the Afghans had cut all possible lines for Maratha Forces.
The Maratha Army consisted of the artillery in front, protected by infantry, pike men, bowman and musketeers. The cavalry was instructed to wait behind the artillery and bayonet holding musketeers and they were ready to charge when control of battlefield is fully established. Behind the line were thirty thousand young men who were not that expert in fighting and then about thirty thousand civilians.
This civilian line consisted of many middle class men, women, children who took this as an opportunity to visit pilgrimage to visit holy places and shrines and also Aryavarta (Aryan land). Behind the civilian line there was another protective infantry line composed of comparatively young and experienced soldiers.