The Delhi Sultanate (1206-1526)
The assassination of Muhammad of Ghor in 1206 shattered his empire, but his Turkish general, Qutb-ud-din Aibak — a former slave — took control of his Indian territories. Aibak became the first ruler of the so-called Slave Dynasty, founding what would become the Delhi Sultanate, the dominant power in north India for over three centuries.
This marked a major turning point. Islam, not Hinduism, became the religion of the ruling elite. And Delhi, not Kanauj or Pataliputra, became the political and cultural heart of the north.
Early expansion and Mongol threats
Aibak’s son-in-law Iltutmish (r. 1211–36) expanded the sultanate from Sind to Bengal. But after his death, instability returned — until Ghiyas-ud-din Balban (r. 1246–87) imposed order and fended off repeated Mongol raids from the northwest.
The Slave Dynasty ended in 1290, replaced by the Khalji dynasty. Its strongest ruler, Ala-ud-din Khalji (r. 1296–1315), crushed the Mongols after they twice besieged Delhi. He then launched expeditions into Gujarat, Rajasthan, and the Deccan, though mostly to raise money rather than build lasting control.
The Tughluqs and Timur’s invasion
The Tughluqs took power in 1320. Under Muhammad bin Tughluq (r. 1325–51), the sultanate reached its widest extent — rivaling Ashoka’s empire. But high taxes and erratic decisions led to rebellion, and in the south, the new Vijayanagar kingdom rose as Delhi’s authority weakened.
Firoz Shah Tughluq (r. 1351–88) brought temporary stability, but after his death, succession struggles returned. In 1398, Timur (Tamerlane) invaded from Central Asia and sacked Delhi, leaving the city in ruins. By the early 1400s, the Delhi Sultanate was just one of several Muslim states in north India.
Decline and the road to Babur
The fragile sultanate was taken over by Khizr Khan in 1414, starting the short-lived Sayyid dynasty, followed by the Lodi dynasty in 1451. Sikander Lodi (r. 1489–1517) brought a brief revival, expanding into Bihar and Jaunpur.
But his son, Ibrahim Lodi, couldn’t hold it together. Facing rebellion, one of his rivals called in Babur, the ruler of Kabul. At the Battle of Panipat in 1526, Babur defeated and killed Ibrahim — bringing the Delhi Sultanate to an end, and setting the stage for the Mughal Empire.