Delhi Sultanate Founded
In 1206, following the assassination of the Ghurid ruler Muhammad of Ghor, his commander Qutb ud-Din Aibak established an independent power centered in northern India. This marked the beginning of the Delhi Sultanate, a succession of Muslim dynasties that would dominate much of the subcontinent for over three centuries and reshape its politics, culture, and architecture.
The background lies in the expansion of the Ghurids, a dynasty from the mountains of central Afghanistan. In the late twelfth century, Muhammad of Ghor pushed into the Indo-Gangetic plain. His forces defeated the Chahamana (Chauhan) king Prithviraj III at the Second Battle of Tarain in 1192, opening the way to Delhi and the Ganges plain. Muhammad relied heavily on Turkic military slaves, trained as soldiers and administrators. Aibak, a former slave himself, rose to become his trusted general and governor of the conquered Indian territories.
When Muhammad was killed in 1206, reportedly while on the road in the Punjab region, his realm had no clear succession plan and fractured among his leading commanders. Aibak, based first at Lahore and then Delhi, took up rule in the Indian provinces. Historians often date the sultanate from this moment, though Aibak's formal status was ambiguous at first, and some sources suggest he received recognition of his position from the Ghurid house only gradually. He ruled only until about 1210, when he died after a polo accident, according to traditional accounts.
His dynasty is commonly called the Mamluk or Slave dynasty, though it was not a single family line, and the name is debated. His successor Iltutmish, who was Aibak's son-in-law and also a former slave, consolidated the state in the following decades, secured recognition from the Abbasid caliph, and made Delhi the lasting capital. Later, Iltutmish's daughter Razia Sultana ruled briefly, a rare case of a woman holding sovereign power in the medieval Islamic world.
The sultanate's legacy was substantial. Five main dynasties followed: the Mamluks, Khaljis, Tughlaqs, Sayyids, and Lodis. They built a centralized administration, introduced new systems of land revenue and coinage, and withstood Mongol incursions. Cultural exchange between Persian, Turkic, and Indian traditions produced new forms in architecture, language, music, and Sufi religious life. Aibak himself began the Qutb Minar in Delhi, which still stands. The sultanate weakened after Timur's sack of Delhi in 1398 and fell in 1526 when Babur defeated the last Lodi sultan, paving the way for the Mughal Empire.