MUHAMMAD GHORI AND HIS LEUTENANTS
Invasion of India by Islamic imperialism was renewed by Muhmmad Ghori in the last quarter of the 12th century. After Prithiviraj Chauhan had been defeated in 1192 AD, Ghori took Ajmer by assault.
According the Taj-ul-Ma'sir of Hasan Nizami, "While the Sultan remained at Ajmer, he destroyed the pillars and foundations of the idol temples and built in their stead mosques and colleges and precepts of Islam, and the customs of the law were divulged and established."
Next year he defeated Jayachandra of Kanauj. A general massacre, rapine, and pillage followed. The Gahadvad treasuries at Asni and Varanasi were plundered. Hasan Nizami rejoices that "in Benares which is the centre of the country of Hind, they destroyed one thousand temples and raised mosques on their foundations".
According to Kamil-ut-Tawarikh of Ibn Asir, "The slaughter of Hindus (at Varanasi) was immense; none were spared except women and children, and the carnage of men went on until the earth was weary."
The women and children were spared so that they could be enslaved and sold all over the Islamic world. It may be added that the Buddhist complex at Sarnath was sacked at this time, and the Bhikshus were slaughtered.
Ghori's lieutenant Qutbuddin Aibak was also busy meanwhile. Hasan Nizami writes that after the suppression of a Hindu revolt at Kol (modern day Aligarh) in 1193 AD, Aibak raised "three bastions as high as heaven with their heads, and their carcases became food for beasts of prey. The tract was freed from idols and idol worship and the foundations of infidelism were destroyed."
In 1194 AD Aibak destroyed 27 Hindu temples at Delhi and built the Quwwat-ul-lslam mosque with their debris. According to Nizami, Aibak "adorned it with the stones and gold obtained from the temples which had been demolished by elephants".
In 1195 AD the Mher tribe of Ajmer rose in revolt, and the Chaulukyas of Gujarat came to their assistance. Aibak had to invite reinforcements from Ghazni before he could meet the challenge. In 1196 AD he advanced against Anahilwar Patan, the capital of Gujarat. Nizami writes that after Raja Karan was defeated and forced to flee, "fifty thousand infidels were dispatched to hell by the sword" and "more than twenty thousand slaves, and cattle beyond all calculation fell into the hands of the victors".
The city was sacked, its temples demolished, and its palaces plundered. On his return to Ajmer, Aibak destroyed the Sanskrit College of Visaladeva, and laid the foundations of a mosque which came to be known as 'Adhai Din ka Jhompada'.
Conquest of Kalinjar in 1202 AD was Aibak's crowning achievement. Nizami concludes: "The temples were converted into mosques... Fifty thousand men came under the collar of slavery and the plain became black as pitch with Hindus."
A free-lance adventurer, Muhammad Bakhtyar Khalji, was moving further east. In 1200 AD he sacked the undefended university town of Odantpuri in Bihar and massacred the Buddhist monks in the monasteries. In 1202 AD he took Nadiya by surprise. Badauni records in his Muntakhab-ut-Tawarikh that "property and booty beyond computation fell into the hands of the Muslims and Muhammad Bakhtyar having destroyed the places of worship and idol temples of the infidels founded mosques and Khanqahs".
Source - http://www.hindunet.org/hindu_history/modern/moghal_atro.htm l