In 1294 Ala-ud-din Khilji, the third of the great Mahommedan conquerors of India, raised himself to the throne of Delhi by the treacherous assassination of his uncle Feroz II. who had himself supplanted the last of the slave dynasty. Ala-ud-din had already won military renown by his expeditions into the yet unsubdued south. He had plundered the temples at Bhilsa in central India, which are admired to the present day as the most interesting examples of Buddhist architecture in the country. At the head of a small band of horsemen, he had ridden as far south as Deogiri (Daulatabad) in the Deccan (q.v.), and plundered the Yadava capital. When once established as sultan, he planned more extensive schemes of conquest. One army was sent to Gujarat under Alaf Khan, who conquered and expelled the last Rajput king of Anhalwar or Patan. Another army, led by the sultan in person, marched into the heart of Rajputana, and stormed the rock-fortress of Chitor, where the Rajputs had taken refuge with their women and children. A third army, commanded by Malik Kafur, a Hindu renegade and favourite of Ala-ud-din, penetrated to the extreme south of the peninsula, scattering the unwarlike Dravidian races, and stripping every Hindu temple of its accumulations of gold and jewels. To this day the name of Malik Kafur is remembered in the remote district of Madura, in association with irresistible fate and every form of sacrilege.
Ala-ud-din died In 1316, having subjected to Islam the Deccan and Gujarat. Three successors followed him upon the throne, but their united reigns extended over only five years. In 1321 a successful revolt was headed by Ghiyas-ud-din Tughlak, governor of the Punjab, who is said to have been of Turkish origin. The Tughlak dynasty lasted for about seventy years, until it was swept away by the invasion of Timur, the fourth Mahommedan conqueror of India, in 1398. Tughlak's son and successor, Mahommed b. Tughlak, who reigned from 1325 to 1351, is described by Elphinstone as "one of the most accomplished princes and one of the most furious tyrants that ever adorned or disgraced human nature." He wasted the treasure accumulated by Ala-ud-din in purchasing the retirement of the Mogul hordes, who had already made their appearance in the Punjab. When the internal circulation failed, he issued a forced currency of copper, which is said to have deranged the whole commerce of the country. At one time he raised an army for the invasion of Persia. At another he actually despatched an expedition against China, which perished miserably in the Himalayan passes. When Hindustan was thus suffering from his misgovernment, he conceived the project of transferring the seat of empire to the Deccan, and compelled the inhabitants of Delhi to remove a distance of 700 m. to Deogiri or Daulatabad. And yet during the reign of this sultan both the Tughlak dynasty and the city of Delhi are said to have attained their utmost growth. Mahommed was succeeded by his cousin Feroz, who likewise was not content without a new capital, which he placed a few miles north of Delhi, and called after his own name. He was a kind-hearted and popular, but weak, ruler. Meanwhile the remote provinces of the empire began to throw off their allegiance to the sultans of Delhi. The independence of the Afghan kings of Bengal is generally dated from 1336, when Mahommed Tughlak was yet on the throne. The commencement of the reign of Ala-ud-din, the founder of the Bahmani dynasty in the Deccan, is assigned to 1347. Zafar Khan, the first of the Ahmedabad kings, acted as an independent ruler from the time of his first appointment as governor of Gujarat in 1391. These and other revolts prepared the way for the fourth great invasion of India under Timur (Tamerlane).