Why this chapter matters for UPSC: The Delhi Sultanate (1206–1526) is heavily tested in GS1 — its five dynasties, key sultans (especially Alauddin Khalji and Muhammad bin Tughlaq), the iqta system, market reforms, Mongol invasions, and architectural contributions are all direct Prelims topics.

PART 1 — Quick Reference Tables

Delhi Sultanate — Five Dynasties

Dynasty Period Key Rulers Notable
Slave/Mamluk 1206–1290 Qutbuddin Aibak, Iltutmish, Razia Sultan, Balban Founded Sultanate; first Muslim dynasty
Khalji 1290–1320 Jalauddin Khalji, Alauddin Khalji Market reforms; military expansion to Deccan; repelled Mongols
Tughlaq 1320–1414 Ghiyasuddin, Muhammad bin Tughlaq, Firuz Shah Tughlaq Expansion then contraction; currency experiment; capital shift
Sayyid 1414–1451 Khizr Khan, 3 others Weak rulers; nominal sovereignty after Timur's invasion
Lodi 1451–1526 Bahlul Lodi, Sikandar Lodi, Ibrahim Lodi Afghan dynasty; ended at First Battle of Panipat (1526)

Major Sultans — Key Facts

Sultan Period Key Contribution/Event
Qutbuddin Aibak 1206–1210 Founded Sultanate; began Qutb Minar construction
Iltutmish 1211–1236 Consolidated Sultanate; completed Qutb Minar; first to issue silver tanka and copper jital coins; received investiture from Caliph of Baghdad
Razia Sultan 1236–1240 First (and only) woman sultan; removed purdah; appointed Abyssinian Malik Yakut as court official; deposed by Turkish nobles
Balban 1266–1286 Concept of divine kingship; "Zil-i-Ilahi" (shadow of God); destroyed power of "Forty" (Chahalgani) nobles; strict discipline
Alauddin Khalji 1296–1316 Market reforms (price control); conquered Deccan (Devagiri, Warangal, Dvarasamudra, Madurai); largest Sultanate territory; repelled 5 major Mongol invasions; Siri fort
Muhammad bin Tughlaq 1324–1351 Token currency experiment; transfer of capital to Devagiri (Daulatabad); taxation in Doab; all failed → empire weakened; Ibn Battuta visited his court
Firuz Shah Tughlaq 1351–1388 Built cities (Firozabad, Hissar, Jaunpur); canal irrigation; translation movement; Tughlaqabad fort
Ibrahim Lodi 1517–1526 Defeated at First Battle of Panipat (1526) by Babur → end of Sultanate

PART 2 — Detailed Notes

Administrative System — Iqta

Key Term

Iqta System: The most distinctive administrative feature of the Delhi Sultanate.

  • The Sultan granted revenue-collection rights over a territory (iqta) to a military officer (iqtadar/muqti)
  • The iqtadar collected land revenue and in return maintained a cavalry contingent for the Sultan
  • Iqtas were NOT hereditary — they were transferred periodically to prevent iqtadars from becoming powerful local lords
  • Iqtadars also acted as local administrators and judges

Significance: The iqta system was a sophisticated solution to the problem of governing a vast empire without a standing army paid directly from the treasury. It decentralised administration while keeping military power with the Sultan.

Evolution: Under Alauddin Khalji, iqtas were more tightly controlled — iqtadars' accounts reviewed, iqtas transferred frequently. Under Firuz Shah, iqtas became more hereditary — weakening central control.

Alauddin Khalji — The Greatest Sultan

UPSC Connect

UPSC GS1 — Alauddin Khalji's reforms:

Alauddin Khalji (1296–1316) was the most powerful Delhi Sultan — he extended the Sultanate's reach to the far south and introduced revolutionary economic reforms:

Market reforms (Market Control Policy):

  • Established 4 separate markets in Delhi: grain market, cloth market, cattle market, miscellaneous goods market
  • Fixed prices for all commodities — grain, cloth, cattle
  • Appointed special officers (Shahna-i-Mandi) and secret spies to ensure compliance
  • Severe punishment for traders who cheated on prices
  • Objective: Maintain a large, cheap army by controlling the cost of living for soldiers
  • Result: Delhi markets became the most regulated in the medieval world; successful for several years

Military reforms:

  • Dagh (branding of horses): Each cavalry horse was branded to prevent soldiers from substituting inferior animals
  • Chehra (descriptive rolls): Each soldier's physical description recorded to prevent fraud
  • Paid soldiers in cash (NOT iqtas) — created a centrally paid standing cavalry army

Mongol invasions: Alauddin repelled 5 major Mongol invasions (1297–1308) — his military system was crucial. Without his victories, the Mongol destruction that devastated Persia and Central Asia might have overwhelmed India.

Deccan conquests:

  • Malik Kafur (Alauddin's general) led campaigns to Devagiri (1307), Warangal (1310), Dvarasamudra (1311), and Madurai (1311)
  • Brought enormous wealth back to Delhi — but left vassal kingdoms in place (did not annex South India directly)

Muhammad bin Tughlaq's Experiments

Explainer

Muhammad bin Tughlaq (1324–1351): Called "the wisest fool" — highly educated (philosophy, science, mathematics) but his policies were practical disasters.

Three famous experiments:

1. Transfer of capital to Daulatabad (1327):

  • Moved capital from Delhi to Devagiri (renamed Daulatabad, Maharashtra)
  • Rationale: Central location for the whole empire; protect from Mongol attacks
  • Forced the entire population of Delhi to march ~1,100 km to Daulatabad
  • Ibn Battuta describes the devastation — people died on the road; Delhi became a ghost city
  • Had to move back to Delhi within a few years — humiliating reversal

2. Token currency experiment (~1329):

  • Shortage of silver → issued copper and brass coins at the same face value as silver tankas
  • Rationale: Expand money supply without enough silver
  • Problem: Easy to counterfeit; people minted coins at home → hyperinflation → economic chaos
  • Had to withdraw the token currency — accepted copper coins back for gold/silver at face value (massive treasury loss)

3. Taxation in the Doab:

  • Raised taxes in the Doab (fertile land between Ganga and Yamuna) at a time of drought
  • Led to peasant revolts; widespread desertion of villages
  • Contributed to famine and economic crisis

Ibn Battuta's account: The Moroccan traveller visited Muhammad bin Tughlaq's court (served as qadi/judge); describes the Sultan as simultaneously generous (giving gifts worth thousands of dinars) and cruelly violent. Rihla (Ibn Battuta's travelogue) is a key primary source for this period.

Architecture — Qutb Complex and Beyond

Explainer

Qutb Minar (Delhi):

  • Started by Qutbuddin Aibak (~1193); first storey completed
  • Completed by Iltutmish (1220s) — added 3 more storeys
  • 5th storey added by Firuz Shah Tughlaq (after lightning damage)
  • 72.5 metres tall; tapering sandstone tower; intricate calligraphy
  • UNESCO World Heritage Site
  • Adjacent: Quwwat-ul-Islam Mosque ("Might of Islam") — first mosque built in Delhi after Islamic conquest; columns reused from 27 Hindu and Jain temples

Iron Pillar (within Qutb Complex):

  • Not built by Sultans — a Gupta-era pillar (~4th–5th century CE) originally from Mathura/elsewhere; installed here
  • Famous for corrosion resistance (1,600+ years without significant rusting) — due to high phosphorus content
  • Inscription mentions a king named Chandra — likely Chandragupta II

Tughlaqabad Fort: Built by Ghiyasuddin Tughlaq (1321); massive fortifications; now in ruins

Siri Fort: Alauddin Khalji's fort; Delhi's 2nd city; now largely vanished (used as building material)

Exam Strategy

Prelims traps:

  • Qutb Minar started by Aibak, completed by Iltutmish — NOT built by a single person
  • Razia Sultan = FIRST and ONLY woman ruler of the Delhi Sultanate (1236–40)
  • Alauddin Khalji = market price controls + Mongol repulsion + Deccan campaigns — NOT Muhammad bin Tughlaq
  • Muhammad bin Tughlaq = token currency + capital transfer to Daulatabad — NOT Alauddin
  • Iron Pillar in Qutb Complex = Gupta era (NOT built by Sultans)
  • First Battle of Panipat (1526): Babur vs Ibrahim Lodi → END of Sultanate; First Battle of Tarain (1192): Muhammad Ghori vs Prithviraj Chauhan → END of Rajput dominance
  • Iltutmish received investiture from Caliph of Baghdad — NOT Aibak or Balban

Previous Year Questions

Prelims:

  1. Which Delhi Sultan introduced market price controls (market reforms) to maintain a large, cheap army?
    (a) Balban
    (b) Alauddin Khalji
    (c) Muhammad bin Tughlaq
    (d) Firuz Shah Tughlaq

  2. Muhammad bin Tughlaq's token currency experiment failed primarily because:
    (a) Merchants refused to accept copper coins
    (b) The coins were easily counterfeited, causing inflation
    (c) The Mongols attacked and disrupted trade
    (d) Silver prices fell making the experiment unnecessary

  3. The Qutb Minar was completed by:
    (a) Qutbuddin Aibak
    (b) Iltutmish
    (c) Balban
    (d) Alauddin Khalji

  4. Razia Sultan was the ruler of the Delhi Sultanate during which dynasty?
    (a) Slave/Mamluk dynasty
    (b) Khalji dynasty
    (c) Tughlaq dynasty
    (d) Lodi dynasty