Turkic Invasions and the Delhi Sultanate

1. Prelude: the Hindu Shahis and Mahmud of Ghazni

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• Hindu Shahis: a powerful dynasty across present-day Afghanistan and northern Pakistan up to Punjab (9th–10th centuries). With help from other Indian rulers they resisted repeated invasions — critically, they controlled the Khyber Pass through the Hindu Kush: invasion corridor, but also a 2,500-year-old trade route and the road of Buddhist monks to Central Asia.
• The Turkic Ghaznavids (capital Ghazna, today's Ghazni, Afghanistan) overran the Shahis: Mahmud of Ghazni defeated Jayapala, then in 1008 overcame his son Anandapala in northern Punjab despite a coalition of north Indian rulers — opening the Indus plains. Mahmud assumed the title sultan (Arabic: 'authority'/'power').
• 17 campaigns in India, each ending with booty carried back to Ghazni; strong resistance (the Chandellas among others) nearly defeated him a few times, but rapid marches and mounted archers prevailed.

Target	Year / note
Jayapala defeated	first decade of 11th century
Anandapala's coalition defeated	1008, northern Punjab
Mathura	1018 — magnificent temple destroyed and plundered (al-Utbi: beyond "the pens of all writers")
Kannauj	after Mathura — one of the last Pratihara rulers taken by surprise
Somnath (Saurashtra)	a few years later — bustling seaport; Somanatha Shiva temple destroyed and looted despite fierce local resistance

• Campaigns brought slaughter of tens of thousands of civilians; prisoners, including children, were sold in Central Asian slave markets; his biographers depict him as cruel also to rival Islamic sects. A Lahore coin of his carries Arabic on one side, Sanskrit on the other (Mahmud as nripati). Al-Biruni, from inside Mahmud's own camp, called the extinct Shahi kings "men of noble sentiment and noble bearing."
• Motive debate (as the chapter frames it): Mahmud held no territory beyond Punjab, so historians have often called plunder the chief motive (large temples held immense wealth). But contemporary evidence shows he also sought to spread his version of Islam: al-Utbi ("destroying their temples… built mosques instead, making the light of Islam visible") and al-Biruni (parts of the Somnath image laid at the Ghazni mosque door for feet-wiping). The NCERT presents both motives as real.

2. Al-Biruni and the intellectual toll

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• Abu Rayhan al-Biruni — Persian scholar from Khwarizm (present-day Uzbekistan); mathematician, astronomer, geographer, historian and linguist writing in Arabic and Persian.
• Accompanied Mahmud into India around 1017; learned Sanskrit, read Indian texts, conversed with Indian scholars → an encyclopaedic survey of Indian religion, philosophy, literature, geography and sciences, often compared with Greek and Islamic traditions. Compiled the mathematics-astronomy of Aryabhata, Varahamihira, Brahmagupta; translated Patanjali's Yogasutras into Arabic.
• His testimony on the raids' cost: "Mahmud utterly ruined the prosperity of the country… Indian sciences have retired far away… to Kashmir, Varanasi, and other places."
• Proof that science still flourished beyond the raided zone: Bhaskaracharya (Bhaskara II, b. 1114, probably present-day Maharashtra) — Lilavati (basic mathematics through riddles), Bijaganita (advanced algebra), Siddhantashiromani (mathematical astronomy); commentaries for centuries, Persian translations in the Mughal period, techniques Europe took centuries to rediscover.

3. Indian resistance in the 11th–12th centuries

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• Chandellas (central India): resisted Mahmud; in these very centuries built dozens of temples at Khajuraho, including the Kandariya Mahadeva and Lakshmana temples.
• Bhoja Paramara of Malwa (capital Dhara; ruled from 1010 for nearly half a century): kingdom from the Konkan to parts of Rajasthan; sent forces to assist the Hindu Shahis against Mahmud. The scholar-king: Samarangana Sutradhara (architecture, mechanical devices), a Yogasutra commentary, works on governance, poetics, medicine; founder of Bhojpur, builder of the vast lake near Bhopal ('Bhojpal' → Bhopal; today's Bhojtal) and the unfinished Bhojeshwar Temple. Distinct from the 9th-century Gurjara-Pratihara Bhoja.
• Chaulukyas (Solankis) of Gujarat (capital Anahilavada/Patan): defeated Muhammad Ghuri at the foot of Mount Abu, 1178 — credited to king Mularaja II or, in a tradition recorded a century later by the Jain scholar Merutunga, to his mother Queen Naikidevi leading the army with her son in her lap (historians are divided; the defeat itself is well recorded — the Naikidevi version is a chapter-reported tradition).
• Chahamanas (Chauhans): powerful Rajput dynasty of Rajasthan that repelled invaders including Mahmud; 12th-century conquests of Delhi, Haryana, parts of Punjab and UP and most of Rajasthan; capital Ajayameru (Ajmer). Their inscriptions call Delhi 'Dhillika' → 'Dhilli' → 'Delhi'.

4. The Ghurid turning point: Tarain and the conquest of the north

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• After Mahmud the Ghaznavid empire disintegrated; the chiefs of Ghur (mountainous Afghanistan west of Ghazni), former Ghaznavid vassals, seized Ghazni. Their sultan Muhammad Ghuri took parts of Punjab and Sindh (his Gujarat push failed, 1178).
• First Battle of Tarain, 1191 (modern Taraori, Haryana): Prithviraja III (Prithviraj Chauhan) defeated Ghuri. Second Tarain, 1192: Ghuri returned with a larger army, defeated and executed Prithviraja, then captured Delhi.
• The decisive contrast: unlike Mahmud, who plundered and withdrew, Ghuri sought territorial conquest — he returned to Ghazni but left generals to consolidate, notably Qutb-ud-din Aibak, who later founded the Delhi Sultanate. Ghuri's coins hedge both worlds: gold as mounted conqueror ('Muhammad ibn Sam'), another carrying Goddess Lakshmi (a coin motif since the Kushanas).
• Bakhtiyar Khilji, Aibak's army commander, campaigned in the east from the end of the 12th century, conquering Bihar and Bengal. He destroyed the great monastic universities of Nalanda and Vikramashila, slaughtering monks — Minhaj al-Siraj Juzjani's Tabakat-i-Nasiri describes shaven-headed "Brahmans" (in fact monks) all slain: "the whole of that fortress and city was a college… they call a college bihar." Nalanda's three-building library (lakhs of manuscripts; where Xuanzang and Yijing had studied) is said to have burned for months; three decades later the monk Dharmasvamin found the site half-ruined, 90-year-old Rahula Shribhadra teaching a last class of ~70 students. Historians of Buddhism agree this destruction precipitated the decline of Buddhism in India (with a few other factors).
• Bakhtiyar then surprised the Sena ruler at Nadiya (c. 1203–04), ending Sena control of much of Bengal; his Tibet expedition through Kamarupa (1205) collapsed — local forces and a scorched-earth population starved his army; he escaped with a handful of men. 1206: Muhammad Ghuri killed; Bakhtiyar assassinated, apparently by his own men; north India stayed with Ghuri's generals.

5. The five dynasties and the character of Sultanate rule

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• The Delhi Sultanate — the chapter dates its formation from the defeat of Prithviraj Chauhan in 1192 — saw five successive foreign dynasties of Turkic-Afghan origin:

Order	Dynasty
1	Mamluks ('Slave dynasty')
2	Khiljis (Khaljis)
3	Tughlaqs
4	Sayyids
5	Lodis (Lodhis)

• Delhi assumed a bigger role in north India's politics, but neighbouring kingdoms — the Eastern Gangas in the east, the Hoysalas in the south — resisted its advance and thrived as centres of art, culture and administration.
• Chronic instability: campaigns raided villages and cities, plundered, and destroyed temples and seats of learning; successions were violent — almost two sultans out of three seized power by eliminating their predecessor; average reign barely nine years.
• Monumental signature: the Qutub Minar complex; the Quwwat-ul-Islam ('Might of Islam') mosque was begun under Qutb-ud-din Aibak (early 13th century), completed by later sultans — an inscription states it used materials from 27 destroyed Hindu and Jain temples.
• The sultans and court elite lived in luxury financed by plunder, taxes on common people and conquered regions, and the slave trade (enslaved people provided free labour or were sold in distant Central Asia); plunder in turn damaged trade networks and agriculture.

6. Khilji expansion

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• Ala-ud-din Khilji (turn of the 14th century): campaigns across large areas of north and central India, sacking and plundering many cities, while also repelling several Mongol invasions (the Mongol Empire then covered most of Asia). His coins style him 'Sikander Sani' — 'the second Alexander' in Persian.
• His slave-general Malik Kafur pushed the Sultanate's reach southward, conquering kingdoms en route; the plundered wealth financed the Sultanate's enormous military apparatus. He attacked Hindu centres including Srirangam, Madurai, Chidambaram, possibly Rameswaram.
• The Hoysalas (mostly present-day Karnataka) fended off several Sultanate attacks and remained the only independent kingdom in the south — until, weakened by these attacks and internal conflicts, they were absorbed into Vijayanagara (mid-14th century).

7. Tughlaq experiments

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• Muhammad bin Tughlaq expanded the Sultanate further: for the first time since the Mauryan Empire, most of the subcontinent was under one ruler — briefly. Ambitious schemes, poorly executed:
• Capital transfer Delhi → Daulatabad (then 'Devagiri', near present-day Sambhaji Nagar), perhaps for its central location; people forced to travel over 1,000 km; the plan misfired and the capital moved back — both transfers causing great loss of life per some sources.

• Token currency: cheap copper coins declared equal in value to silver or gold — a progressive idea (most modern currency is token) that bred trade confusion and mass counterfeiting; the economy declined.

• Resistance snapshot: the Musunuri Nayakas, Telugu chieftains, rallied over 75 chieftains into a confederacy that expelled Muhammad bin Tughlaq's army from Warangal (present-day Telangana) around 1330–1336.

8. Administration: the iqta system

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• The sultan held absolute authority as political and military head; contemporary chronicles list his duties as "defending the territories of Islam," "collecting fees and taxes," and "keeping in touch with public affairs… by personal contact." A council of ministers headed the departments.
• The iqta system: territories assigned to nobles (iqtadars) to collect taxes, which — minus expenses — were due to the sultan's treasury, above all to maintain the army. It created a network of local administrators loyal to the centre; posts were not hereditary.
• Precursor (class 7): Muhammad Ghuri's more centralised system already granted temporary land assignments to officers for revenue collection and military service — further developed under the Sultanate.
• Tax burden: trade taxed at every stage, but the weight fell most heavily on the peasantry, with contemporary accounts reporting considerable cruelty in extraction; land revenue typically one-fifth of produce, raised by some sultans to one-half.

9. Society, religion and economy under the Sultanate

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• Iconoclasm (rejection or destruction of religious images considered idolatrous): numerous attacks on sacred images in Buddhist, Jain and Hindu temples — motivated not just by plunder but also by iconoclasm. (Chapter's terminology note: 'image' is the neutral English term; 'idol'/'icon' are pejorative in orthodox Abrahamic contexts; Indian texts say murti, vigraha, pratima, rupa.)
• Jizya: a tax on non-Muslim subjects in exchange for protection and exemption from military service. In practice, depending on the ruler, it was an economic burden, a public humiliation, and a financial-social incentive to convert to Islam.
• Yet the economy showed resilience — the subcontinent remained one of the wealthiest regions in the world, built on:
• agrarian foundations, artisanal industry, and decentralised systems — shrenis (guilds), jatis (professionally defined communities), credit systems;
• the hundi — a written payment instruction usable across political borders, sparing merchants the risk of carrying currency (a banking precursor operating without the ruling classes' participation); Marwari traders ran parallel credit-and-trust systems across regimes;
• temples as economic ecosystems: markets, dana held in trust, irrigation tanks, dharmashalas/chhatrams, credit to merchants, funding of internal and maritime trade;
• infrastructure gains — roads in north India, bridges, a few canals, new cities; coins in several metals and denominations; exports (via Calicut, Mangalore, Surat, Masulipatnam, Hooghly) far exceeding imports (silk, horses, metals, luxuries).

10. Resistance, regional states and decline

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• Kingdoms that held out: Eastern Gangas (east) and Hoysalas (the south's last independent kingdom until Vijayanagara absorbed it). In Rajasthan, Rana Kumbha of Mewar (15th century; Rana = Rajput royal title) repelled the later sultanates too; his Kumbhalgarh Fort in the Aravallis has a 36-km wall, one of the longest continuous walls in the world.
• Breakaway sultanates fragmented Delhi's power: the Bahmani Sultanate (mid-14th century, much of the Deccan), plus powerful sultanates in Gujarat, Bengal and elsewhere — alliances and frequent wars. In the south, Harihara and Bukka, once governors under Muhammad bin Tughlaq, rejected Delhi's authority and founded the Vijayanagara Empire (see vijayanagara topic).
• Timur (end of the 14th century): the Turkic-Mongol conqueror's devastating sack of Delhi — his memoirs give a two-fold objective, "war with the infidels and to gain something by plundering the wealth of the infidels." Large numbers killed or enslaved; the thriving city left in ruins; Timur withdrew with huge plunder, leaving chaos.
• In the aftermath the Lodis established the Sultanate's last dynasty — its territory by then shrunk considerably under rising Indian resistance. Babur's victory over Ibrahim Lodi at Panipat, 1526, put the final end to the Delhi Sultanate (see mughal-empire topic).

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Exam angles

Prelims:

• Dynasty order: Mamluk → Khilji → Tughlaq → Sayyid → Lodi (classic sequencing).
• Battle-year pairings: Anandapala 1008 · Mathura 1018 · Mount Abu 1178 (Ghuri defeated) · Tarain I 1191 (Ghuri loses) · Tarain II 1192 (Prithviraj loses) · Nadiya c. 1203–04 · Warangal expulsion c. 1330–36 · First Panipat 1526.
• Who destroyed what: Mahmud — Mathura, Kannauj, Somnath · Bakhtiyar Khilji — Nalanda, Vikramashila (and overthrew the Senas) · Timur — Delhi · Malik Kafur — Srirangam, Madurai, Chidambaram.
• Person-role pairings: al-Biruni (accompanied Mahmud c. 1017, learned Sanskrit, translated the Yogasutras into Arabic) · al-Utbi (Mahmud's court historian) · Malik Kafur (Ala-ud-din's slave-general) · Qutb-ud-din Aibak (Ghuri's general; founded the Sultanate; began Quwwat-ul-Islam mosque) · Minhaj al-Siraj Juzjani (Tabakat-i-Nasiri) · Bhaskaracharya (Lilavati, Bijaganita, Siddhantashiromani).
• Terms: iqta/iqtadar, jizya, sultan/sultanate, hundi, iconoclasm, Rana; token currency + Daulatabad transfer = Muhammad bin Tughlaq; 'Sikander Sani' = Ala-ud-din Khilji, who also repelled the Mongols.
• Trap statements (mark FALSE): "Mahmud of Ghazni sought territorial conquest of India" (raids only; Ghuri sought territory) · "Prithviraj Chauhan won the Second Battle of Tarain" (won the first) · "iqta posts were hereditary" · "the Quwwat-ul-Islam mosque was built by Ala-ud-din Khilji" (begun under Aibak) · "Nalanda was destroyed by Mahmud of Ghazni" (Bakhtiyar Khilji).
• Geography hooks: Hindu Shahis — Khyber Pass · Chahamana capital Ajayameru (Ajmer) · 'Dhillika' → Delhi · Kumbhalgarh — Aravallis, 36-km wall.

Mains:

• Raid vs conquest: Mahmud of Ghazni's 17 plunder campaigns vs Muhammad Ghuri's territorial state-building — how differing motives shaped outcomes (GS-I classic).
• Plunder vs iconoclasm: assess motives for temple destruction from contemporary sources (al-Utbi, al-Biruni, Timur's memoirs) — the NCERT holds both motives operated.
• Why the Sultanate stayed unstable: violent successions (2 of 3 sultans by elimination; ~9-year reigns), plunder economy, over-extension; Muhammad bin Tughlaq's Daulatabad and token-currency experiments as ambition-vs-execution case study.
• Destruction of Nalanda/Vikramashila and the decline of Buddhism; al-Biruni on sciences fleeing to Kashmir and Varanasi — invasions and India's knowledge traditions.
• Resilience thesis: shrenis, jati production, hundi credit, Marwari networks, temple economies and holdout kingdoms (Hoysalas, Mewar, Eastern Gangas) kept India among the world's wealthiest regions despite political chaos.