The Delhi Sultanate

Five dynasties, 1206–1526 — the backbone of India's medieval political history, and the single most detail-tested block after the Mughals.

Memory hook: Slave → Khilji → Tughlaq → Sayyid → Lodi — "Slaves Kept Their Slaves Loyal."

Practice Recall: List the five dynasties of the Delhi Sultanate in order before reading on. (Answer: Mamluk/Slave → Khilji → Tughlaq → Sayyid → Lodi.)

Mamluk (Slave) Dynasty, 1206–1290

Founded by Qutb-ud-din Aibak, a former Turkish slave-general of Muhammad of Ghor, who began the Qutub Minar (completed by successors) and established Delhi as the new seat of power.

• Iltutmish (1211–1236) is the dynasty's real consolidator: he introduced the Iqta system — assigning revenue-yielding land tracts (iqtas) to nobles/officers in lieu of cash salary, in exchange for maintaining troops for the Sultan — the backbone of Sultanate-era administration and military organisation for the next century. He also formed the "Turkan-i-Chihalgani" (Group/Corps of Forty), an elite cadre of Turkish nobles who wielded major influence over succession and administration, and he secured formal recognition from the Abbasid Caliph, lending legitimacy to the Delhi throne.
• Razia Sultana (1236–1240), Iltutmish's daughter, is the only woman ever to rule as Sultan of Delhi — her reign, though short and ultimately undone by noble opposition to a woman ruler (compounded by her elevation of an Abyssinian noble, Yaqut, to high office), remains a standout exam fact.
• Ghiyasuddin Balban (1266–1287), originally one of the "Chihalgani," ruthlessly broke the power of that same noble faction on becoming Sultan and propounded the "theory of kingship" (Niyabat-i-Khudai, king as "Shadow of God on Earth"), enforcing rigid court ceremonial (sijda and paibos — prostration and foot-kissing) to overawe the nobility; adopted a harsh "blood and iron" policy against rebels and Mongol raiders.

Khilji Dynasty, 1290–1320

Founded by Jalaluddin Khilji; the dynasty's importance rests almost entirely on his nephew and successor.

• Alauddin Khilji (1296–1316) is remembered chiefly for an ambitious and unprecedented set of market-control reforms: fixed price ceilings on grain, cloth, and other essential goods, state-regulated markets (Sarai-i-Adl) with officers (Shahna-i-Mandi) enforcing prices and preventing hoarding — introduced primarily to sustain a large standing army on fixed pay without runaway costs. He repelled repeated Mongol invasions of north India (a genuine existential threat during his reign) and conducted extensive Deccan campaigns via his general Malik Kafur, who raided as far as the Pandya kingdom, bringing enormous plunder (including, by some traditional accounts, the Kohinoor diamond) back to Delhi. He also raised a large standing army and introduced a systematic espionage network to keep nobility in check.

Tughlaq Dynasty, 1320–1414

Founded by Ghiyasuddin Tughlaq; the dynasty saw the Sultanate's greatest territorial extent followed by its fastest unravelling.

• Muhammad bin Tughlaq (1325–1351) — brilliant but erratic, and a classic exam figure for "ambitious ideas, disastrous execution." His two most tested policies: (1) the transfer of capital from Delhi to Daulatabad (Devagiri) in the Deccan, intended to better govern a geographically vast empire and escape Mongol threat to Delhi, reversed after enormous hardship and loss of life during the forced population transfer; and (2) the introduction of token/symbolic currency — bronze/copper coins declared equal in value to silver tankas — an idea sound in principle (similar to modern fiat currency) but disastrously executed due to rampant counterfeiting and lack of controls, forcing the Sultan to redeem the coins at heavy treasury loss.
• Firoz Shah Tughlaq (1351–1388) — reversed many of his predecessor's harsh measures, and is remembered for extensive public works: irrigation canals, hospitals (Dar-ul-Shifa), rest houses, and the founding of new towns (Firozabad, Hisar, Jaunpur); reinstated the jizya as a distinct tax and reimposed several orthodox religious measures; also notably restored/repurposed two Ashokan pillars, moving them to Delhi.
• The dynasty's rapid decline culminated in Timur's invasion and sack of Delhi in 1398, from which the Sultanate never fully recovered its earlier extent.

Sayyid Dynasty, 1414–1451

Founded by Khizr Khan (who had governed Delhi as Timur's nominal deputy); a weak, transitional dynasty controlling little beyond the Delhi region itself, ended when the last Sayyid ruler voluntarily ceded the throne to Bahlul Lodi.

Lodi Dynasty, 1451–1526

The only Afghan (Pashtun) dynasty of the Sultanate, as opposed to the preceding Turkish lines.

• Bahlul Lodi (1451–1489) — founder, consolidated Delhi's authority over rebellious nobles.
• Sikandar Lodi (1489–1517) — an effective administrator; founded the city of Agra (which would later become a major Mughal capital); patronised trade and standardised measures; also known for some religiously intolerant measures against Hindu institutions.
• Ibrahim Lodi (1517–1526) — the last Delhi Sultan; his high-handed treatment of Afghan nobles led governor Daulat Khan Lodi to invite Babur to invade; Ibrahim was defeated and killed at the First Battle of Panipat, 1526, ending the Delhi Sultanate and opening the Mughal era.