Arab & Turkish Invasions — Prelude to the Delhi Sultanate

Why This Chapter Matters

This chapter covers the three waves of invasion that ended ancient India and opened the medieval period: the Arab conquest of Sindh, the Ghaznavid raids from Afghanistan, and the Ghurid conquest that finally set up Turkish rule in Delhi. SSC and RRB papers pick up 2 to 4 questions from this chapter almost every attempt, mostly one-liners on dates and names. Muhammad bin Qasim's conquest of Sindh in 712 CE, Mahmud of Ghazni's seventeen raids and the Somnath temple attack of 1025, and the two Battles of Tarain (1191 and 1192) between Prithviraj Chauhan and Muhammad of Ghor are the three most repeated facts in this space.

The sub-topics that come back year after year are: the year of the Arab conquest of Sindh and the ruler defeated (Dahir), the number of Mahmud's raids into India (usually stated as seventeen) and the Somnath raid date, the difference between Muhammad Ghazni and Muhammad Ghori (a very common confusion trap in MCQs), the two Tarain battles and their outcomes, and Qutb-ud-din Aibak's role as Ghori's slave-general before he became the first Sultan of Delhi. Get these names, years and "who defeated whom" facts locked in and this chapter's questions become the easiest marks in the whole Medieval India section.

1. Arab Conquest of Sindh (712 CE)

The first Muslim invasion of India came not from Central Asia but from Arabia, and it landed on the western coast, not through the usual northwest passes.

Muhammad bin Qasim, a young general of the Umayyad Caliphate, led an Arab army into Sindh in 712 CE. The Caliph of the time was Al-Walid I of the Umayyad dynasty, and the governor of Iraq who sent Qasim on this expedition was Hajjaj bin Yusuf, his uncle (in some accounts, father-in-law).

The immediate trigger given by Arab chroniclers was an act of piracy: pirates near Debal (a port in Sindh) had looted ships carrying gifts and Muslim women from Sri Lanka to the Caliph. When the ruler of Sindh, Raja Dahir, refused to make good the loss, Hajjaj sent Qasim to punish him.

Qasim's campaign moved in stages: he first captured the port of Debal, then moved on to Nerun and Sehwan, and finally met Dahir's main army on the banks of the Indus near Raor (Rawar). Dahir was killed in this battle and his kingdom fell. Qasim then took Brahmanabad, Alor (the Sindh capital) and eventually Multan, which was so rich in temple gold that Arab writers called it "the frontier of gold" (Farj-i-Bait-uz-Zahab).

Sindh and Multan became the easternmost province of the Umayyad Caliphate. Qasim is credited with the "Dahir-nama"-style administrative settlement in which non-Muslims (Hindus and Buddhists) were treated as zimmis (protected subjects) who paid jizya (a tax on non-Muslims) in exchange for protection and freedom of worship, a pattern of governance that recurs through Sultanate and Mughal history.

Qasim's career ended abruptly: he was recalled to Damascus after Hajjaj's death (Hajjaj died in 714 CE) and, according to the traditional account, was executed on the orders of the new Caliph over a personal grudge held by Dahir's daughters, who had been sent to the Caliph's court. This story is disputed by some modern historians, but it remains the version most commonly given in Indian textbooks.

Why the Sindh conquest did not spread further: Arab rule stayed confined to Sindh and Multan for nearly three centuries. It did not push into the Gangetic plains because of strong resistance from Pratihara, Rashtrakuta and other regional powers of northern and western India, and because the Caliphate's own attention was divided across a vast empire from Spain to Central Asia. Sindh under Arab and later local Muslim rulers stayed a separate, somewhat isolated frontier until the Ghaznavid period.

2. Mahmud of Ghazni (997–1030 CE)

After nearly 300 years of relative quiet on India's northwest frontier, the next major invasion came from Ghazni, a kingdom in present-day Afghanistan, under Mahmud of Ghazni, son of Subuktigin of the Yamini (Ghaznavid) dynasty. Mahmud ruled from 997 to 1030 CE and led repeated campaigns into India between roughly 1000 and 1027 CE.

Standard exam-level accounts say Mahmud invaded India seventeen times. His stated motive combined two things: he wanted the enormous wealth stored in Indian temples and cities, and he wanted to be seen back home as a champion of Islam against "idolatry," a title that also brought him legitimacy and the honour of "Ghazi" from the Abbasid Caliph in Baghdad.

Key campaigns to remember:

• 1001 CE: Mahmud defeated Jayapala, the Hindu Shahi ruler of Punjab (Waihind/Peshawar region), in the first major clash. Jayapala later killed himself.
• 1004–1008 CE: Mahmud defeated Jayapala's son Anandapala, ending Hindu Shahi power as a major check on invasions from the northwest.
• 1018 CE: Mahmud sacked Mathura and Kannauj, then under weak rulers following the decline of the Gurjara-Pratihara empire.
• 1025 CE: Mahmud's most famous raid, on the Somnath temple in Kathiawar (Gujarat), dedicated to Shiva. He defeated the local Chalukya-era defenders (the ruler is usually named Bhimdev I of the Solanki/Chalukya dynasty of Gujarat in traditional accounts), destroyed the temple's idol, and carried away a legendary quantity of gold and jewels. This raid is the single most-quoted event from Mahmud's career in exam questions.

Mahmud's Indian conquests were never meant to build an Indian empire. Apart from Punjab and parts of Sindh, which he annexed and governed from Ghazni through a governor, he took no interest in permanent rule over Indian territory. Every expedition returned to Ghazni loaded with plunder.

Mahmud's court at Ghazni became a major centre of Persian and Islamic learning. His most famous courtier was Al-Biruni, a scholar who accompanied him and later wrote "Tahqiq-i-Hind" (Kitab-ul-Hind), a detailed account of Indian society, science, religion and geography as observed in the early 11th century, one of the earliest and most valuable outsider descriptions of India in this period. The poet Firdausi, author of the Persian epic Shahnama, is also traditionally associated with Mahmud's court, though the relationship between the two is described by chroniclers as strained.

Exam tip: Do not confuse Mahmud of Ghazni (raider, 17 invasions, Somnath 1025, no interest in ruling India, died 1030) with Muhammad of Ghor (conqueror, defeated Prithviraj Chauhan, founded the basis of permanent Turkish rule in India). SSC-style papers frequently swap these two names as a distractor option.

3. The Political Map of North India Before Ghori (Late 12th Century)

Before Muhammad of Ghor's decisive campaigns, north India was divided among several regional powers, none strong enough alone to face a sustained foreign invasion, and none willing to unite with the others.

Region	Ruling Dynasty/Ruler (late 12th c.)
Delhi and Ajmer	Chauhans (Chahamanas) — Prithviraj Chauhan III
Kannauj	Gahadavalas — Jaichand
Gujarat	Chalukyas (Solankis)
Bundelkhand	Chandelas
Bengal & Bihar	Senas

Prithviraj Chauhan III (ruled c. 1178–1192) was the Chahamana king of Ajmer and Delhi, the last major Hindu ruler of Delhi before Turkish conquest. He is remembered in later legend (the "Prithviraj Raso", a heroic poem attributed to his court poet Chand Bardai) as a romantic and martial hero, most famously for the tale of his elopement with Sanyogita, daughter of Jaichand of Kannauj, an episode that folklore blames for weakening Hindu unity against Ghori, though modern historians treat this story with caution as it comes mainly from bardic poetry, not contemporary record.

Political rivalry between Prithviraj Chauhan and Jaichand of Kannauj meant the two most powerful rulers of north India did not combine forces when Ghori invaded, a point often cited (again, more folklore than confirmed fact) as a key reason the invasion succeeded.

4. Muhammad of Ghor (Shihabuddin Muhammad Ghori)

Muhammad of Ghor, also called Muizzuddin Muhammad bin Sam, ruled the kingdom of Ghor (also in present-day Afghanistan, a rival power to Ghazni) along with his elder brother Ghiyasuddin Muhammad, who held the senior throne while Muizzuddin governed and led military campaigns as the working head of the western expansion.

Unlike Mahmud of Ghazni, Ghori's ambition in India was not simply plunder. He aimed to conquer and hold territory, and this makes him, in the standard exam narrative, the real founder of Turkish political power in India, even though he never personally settled in India or founded a dynasty there himself; that task fell to his slave-general.

Ghori's early campaigns:

• 1175 CE: Captured Multan.
• 1178 CE: Suffered a defeat trying to advance into Gujarat against the Chalukya (Solanki) ruler, a rare early setback.
• 1186 CE: Annexed Punjab, ending the last remnant of Ghaznavid rule there (the last Ghaznavid ruler, Khusrau Malik, was captured).

With Punjab secured as a base, Ghori turned toward Delhi and Ajmer, ruled by Prithviraj Chauhan, setting up the two battles that are the centrepiece of this chapter.

5. The First Battle of Tarain (1191 CE)

Fought at Tarain (Taraori), near Thanesar in present-day Haryana, in 1191 CE.

Ghori's forces clashed with the combined army of Prithviraj Chauhan, who is said to have been supported by a large coalition of Rajput rulers. In this battle, Prithviraj Chauhan defeated Muhammad of Ghori. Ghori himself was wounded, reportedly by Govind Rai (Prithviraj's general/kinsman) in personal combat, and had to retreat to Ghazni.

Prithviraj did not press his advantage to permanently expel the Ghurid threat, and he returned to Delhi without decisively destroying Ghori's power, a decision that gave Ghori time to regroup, reorganise and return the following year with a stronger, better-prepared force.

6. The Second Battle of Tarain (1192 CE)

Fought at the same location in 1192 CE, this time Ghori returned with a much larger and reportedly more disciplined army, including a reported strength of over a hundred thousand mounted archers in traditional accounts.

Muhammad of Ghori decisively defeated Prithviraj Chauhan in this battle. Prithviraj was captured; traditional accounts differ on his fate; some say he was executed at Ajmer after being taken as prisoner, others describe a later legendary story involving Chand Bardai and an arrow contest, which is bardic tradition rather than settled history and is not treated as fact in exam material.

The Second Battle of Tarain (1192 CE) is the single most important date in this chapter. It is treated as the event that ends ancient/early-medieval Rajput political dominance of north India and opens the door to permanent Turkish rule, effectively the real starting point of the Delhi Sultanate period even though the Sultanate is formally dated from 1206.

After this victory, Ghori's forces, especially under his trusted slave-general, rapidly absorbed the remaining north Indian kingdoms:

• 1194 CE: Battle of Chandawar, on the Yamuna near Kannauj, where Ghori's forces (commanded by Qutb-ud-din Aibak) defeated and killed Jaichand, the Gahadavala ruler of Kannauj. This removed the other major power that could have resisted Turkish expansion.
• Following Chandawar, Turkish forces steadily extended control over Kannauj, Varanasi, Bihar and parts of Bengal over the next decade, largely carried out by Aibak while Ghori himself returned to Ghazni to manage his kingdom's affairs closer to Central Asia.

7. Qutb-ud-din Aibak's Early Role

Qutb-ud-din Aibak began his career as a Turkish slave (mamluk) purchased and trained by Muhammad of Ghori. He rose through merit to become one of Ghori's most trusted generals and was placed in charge of Ghori's Indian conquests as viceroy, based first at Delhi and later also holding sway over Ajmer.

While Ghori remained the overlord ruling from Ghazni/Ghor, Aibak effectively governed and expanded the Indian territories on his behalf between 1192 and 1206 CE: defeating Jaichand at Chandawar (1194), capturing Delhi, Ajmer, Kannauj and parts of Bihar and Bengal (aided by his own subordinate general, Bakhtiyar Khalji, who overran Bihar and Bengal around 1202–1206 CE and is remembered for the destruction of the great Buddhist monastic university of Nalanda).

In 1206 CE, Muhammad of Ghori was assassinated near the Indus river, reportedly by members of an Ismaili sect (some accounts say Khokhar tribesmen), while returning from Ghazni. He left no son. His Indian territories, lacking a direct heir on the ground, passed by default to his most powerful slave-general in India.

Qutb-ud-din Aibak declared himself Sultan of Delhi in 1206 CE, taking the throne independently of Ghor and Ghazni. This event marks the formal beginning of the Delhi Sultanate and the Slave (Mamluk) Dynasty, the subject of the next chapter. Aibak's rise from purchased slave to independent sovereign is one of the most repeated "rags to throne" facts in medieval India questions, and it sets up why this chapter is titled a "prelude": everything here, from Qasim's Sindh conquest to the two Tarain battles, builds toward the single hinge event of 1206 CE.

8. Why the Turkish Conquest Succeeded Where Others Had Failed

Exam questions occasionally frame this as a "reason" question, so it is worth noting the standard, mainstream explanation, kept brief and factual:

• Superior cavalry and mounted archery: Turkish armies used fast, mobile horse-archers and a centralised command structure, while Rajput armies relied more heavily on elephants and feudal levies that were harder to coordinate.
• Political disunity: North India was fragmented into competing kingdoms (Chauhans, Gahadavalas, Chandelas, Solankis) that did not combine against a common threat; some, like Jaichand, are traditionally (though not with full historical certainty) blamed for even indirectly aiding Ghori out of rivalry with Prithviraj.
• Iqta and slave-military system: Turkish rulers used a system of assigning revenue-bearing land (iqta) to military commanders and relied on loyal, professionally trained slave-generals (like Aibak), giving them administrative flexibility that Indian feudal structures lacked.
• Repeated campaigning: Both Mahmud of Ghazni and Muhammad of Ghori returned again and again despite setbacks (Ghori's own defeat in 1191), wearing down resistance over time, unlike single one-off invasions.

This chapter's period, roughly 712 to 1206 CE, therefore spans exactly five centuries between the first Arab foothold in Sindh and the first fully Turkish sultan of Delhi, though the two are separated by long gaps of relative inactivity and are connected mainly by the general theme of invasions from the northwest.

Quick Revision — One-Line Facts

• 712 CE: Muhammad bin Qasim conquered Sindh for the Umayyad Caliphate, defeating Raja Dahir.
• Qasim was sent by Hajjaj bin Yusuf, governor of Iraq, under Caliph Al-Walid I.
• Qasim captured Debal, Nerun, Sehwan and finally Multan, called "the frontier of gold."
• Qasim introduced the zimmi status and jizya tax for non-Muslim subjects in Sindh.
• Mahmud of Ghazni ruled 997–1030 CE, son of Subuktigin, of the Yamini (Ghaznavid) dynasty.
• Mahmud invaded India 17 times between roughly 1000 and 1027 CE.
• Mahmud defeated Jayapala (Hindu Shahi ruler) in 1001 CE; Jayapala's son Anandapala was defeated 1004–1008 CE.
• Mahmud's most famous raid: the Somnath temple, Gujarat, in 1025 CE.
• Mahmud annexed Punjab and Sindh to the Ghaznavid empire; he did not try to hold the rest of India.
• Al-Biruni, author of "Tahqiq-i-Hind" (Kitab-ul-Hind), was part of Mahmud's court and wrote a detailed account of Indian society.
• Firdausi, author of the Shahnama, is traditionally linked to Mahmud's court.
• Muhammad of Ghor (Muizzuddin Muhammad bin Sam) ruled with elder brother Ghiyasuddin Muhammad of Ghor.
• Ghori captured Multan (1175) and Punjab (1186), ending the last Ghaznavid ruler Khusrau Malik.
• First Battle of Tarain, 1191 CE: Prithviraj Chauhan defeated Muhammad of Ghori.
• Second Battle of Tarain, 1192 CE: Muhammad of Ghori defeated Prithviraj Chauhan decisively.
• The Second Battle of Tarain (1192) is treated as the real turning point opening Turkish rule in India.
• Battle of Chandawar, 1194 CE: Aibak defeated and killed Jaichand, ruler of Kannauj.
• Prithviraj Chauhan was the Chahamana (Chauhan) king of Ajmer and Delhi; court poet Chand Bardai wrote the Prithviraj Raso.
• Bakhtiyar Khalji, a subordinate of Aibak, overran Bihar and Bengal (c. 1202–1206 CE) and destroyed Nalanda university.
• Muhammad of Ghori was assassinated in 1206 CE near the Indus, leaving no direct heir.
• Qutb-ud-din Aibak declared himself Sultan of Delhi in 1206 CE, founding the Slave (Mamluk) Dynasty.
• Aibak began his career as a Turkish slave (mamluk) bought and trained by Ghori.
• The period from 712 CE (Qasim) to 1206 CE (Aibak) spans roughly five centuries of invasions from the northwest.
• Sindh under Arab rule stayed a separate frontier province; it did not expand into the Gangetic plains.
• North India before Ghori was divided among Chauhans (Delhi-Ajmer), Gahadavalas (Kannauj), Solankis (Gujarat), Chandelas (Bundelkhand) and Senas (Bengal-Bihar).
• Rivalry between Prithviraj Chauhan and Jaichand is often cited (though based mainly on bardic tradition) as a reason Turkish conquest succeeded.
• Superior mobile cavalry, mounted archery and the iqta/slave-military system gave Turkish armies an edge over feudal Rajput levies.
• Mahmud of Ghazni's raids were driven by plunder and religious prestige; he built no lasting Indian empire beyond Punjab-Sindh.
• Muhammad of Ghori's campaigns aimed at conquest and permanent rule, unlike Mahmud's raids.

Memory Tables

Table A: Key Battles and Events (Chronological)

Year	Event	Key Figures	Result/Significance
712 CE	Arab conquest of Sindh	Muhammad bin Qasim vs Raja Dahir	Sindh and Multan became Umayyad province
1001 CE	First clash with Hindu Shahis	Mahmud of Ghazni vs Jayapala	Jayapala defeated; later ended his own life
1025 CE	Somnath temple raid	Mahmud of Ghazni	Temple destroyed, huge plunder taken
1030 CE	Death of Mahmud of Ghazni	—	End of Ghaznavid raiding phase
1175 CE	Capture of Multan	Muhammad of Ghori	First major Ghurid foothold in India
1186 CE	Annexation of Punjab	Muhammad of Ghori vs Khusrau Malik	End of Ghaznavid rule in India
1191 CE	First Battle of Tarain	Prithviraj Chauhan vs Muhammad of Ghori	Prithviraj won; Ghori wounded, retreated
1192 CE	Second Battle of Tarain	Muhammad of Ghori vs Prithviraj Chauhan	Ghori won decisively; Prithviraj captured
1194 CE	Battle of Chandawar	Qutb-ud-din Aibak vs Jaichand	Jaichand defeated and killed; Kannauj fell
c. 1202–1206 CE	Conquest of Bihar and Bengal	Bakhtiyar Khalji	Nalanda destroyed; eastern India opened to Turkish rule
1206 CE	Assassination of Muhammad of Ghori	Near the Indus	Left no heir; Indian territories passed to Aibak
1206 CE	Aibak becomes Sultan of Delhi	Qutb-ud-din Aibak	Formal start of the Delhi Sultanate

Table B: Person to Contribution/Association

Person	Association
Muhammad bin Qasim	Conquered Sindh, 712 CE, for the Umayyad Caliphate
Hajjaj bin Yusuf	Governor of Iraq who sent Qasim to Sindh
Raja Dahir	Ruler of Sindh defeated and killed by Qasim
Mahmud of Ghazni	17 raids into India; Somnath raid 1025 CE
Al-Biruni	Wrote Tahqiq-i-Hind (Kitab-ul-Hind); accompanied Mahmud
Firdausi	Author of the Shahnama; linked to Mahmud's court
Muhammad of Ghori	Conqueror aiming at permanent rule; won Second Tarain (1192)
Prithviraj Chauhan	Chahamana king of Delhi-Ajmer; won First Tarain, lost Second Tarain
Chand Bardai	Court poet of Prithviraj; wrote the Prithviraj Raso
Jaichand	Gahadavala ruler of Kannauj; defeated and killed at Chandawar (1194)
Qutb-ud-din Aibak	Ghori's slave-general; became first Sultan of Delhi, 1206 CE
Bakhtiyar Khalji	Conquered Bihar and Bengal; destroyed Nalanda

Practice MCQs

Q1. In which year did Muhammad bin Qasim conquer Sindh? (a) 632 CE (b) 712 CE (c) 812 CE (d) 912 CE

Q2. Who was the ruler of Sindh defeated by Muhammad bin Qasim? (a) Jayapala (b) Raja Dahir (c) Anandapala (d) Khusrau Malik

Q3. Muhammad bin Qasim's expedition to Sindh was sent by which governor of Iraq? (a) Al-Walid I (b) Hajjaj bin Yusuf (c) Subuktigin (d) Ghiyasuddin Muhammad

Q4. How many times is Mahmud of Ghazni traditionally said to have invaded India? (a) 7 times (b) 12 times (c) 17 times (d) 21 times

Q5. The famous raid on the Somnath temple by Mahmud of Ghazni took place in which year? (a) 1001 CE (b) 1018 CE (c) 1025 CE (d) 1030 CE

Q6. Who wrote "Tahqiq-i-Hind" (Kitab-ul-Hind), an account of Indian society, during Mahmud of Ghazni's reign? (a) Firdausi (b) Al-Biruni (c) Chand Bardai (d) Amir Khusrau

Q7. Which of the following pairs is correctly matched? (a) Muhammad of Ghazni — First Battle of Tarain (b) Muhammad of Ghori — Somnath raid (c) Muhammad of Ghori — Second Battle of Tarain (d) Muhammad bin Qasim — Battle of Chandawar

Q8. The First Battle of Tarain (1191 CE) was won by: (a) Muhammad of Ghori (b) Prithviraj Chauhan (c) Jaichand (d) Qutb-ud-din Aibak

Q9. The Second Battle of Tarain, in which Prithviraj Chauhan was decisively defeated, was fought in: (a) 1191 CE (b) 1192 CE (c) 1194 CE (d) 1206 CE

Q10. The Battle of Chandawar (1194 CE), in which Jaichand of Kannauj was defeated, was fought by: (a) Muhammad of Ghori personally (b) Qutb-ud-din Aibak (c) Bakhtiyar Khalji (d) Mahmud of Ghazni

Q11. Arrange the following events in chronological order:

1. Second Battle of Tarain
2. Arab conquest of Sindh
3. Somnath temple raid
4. Aibak becomes Sultan of Delhi (a) 2, 3, 1, 4 (b) 2, 1, 3, 4 (c) 3, 2, 1, 4 (d) 2, 3, 4, 1

Q12. Which general, under Qutb-ud-din Aibak, conquered Bihar and Bengal and destroyed the Nalanda monastic university? (a) Bakhtiyar Khalji (b) Iltutmish (c) Jaichand (d) Ghiyasuddin Muhammad

Q13. Qutb-ud-din Aibak declared himself Sultan of Delhi in which year, following the assassination of Muhammad of Ghori? (a) 1192 CE (b) 1194 CE (c) 1202 CE (d) 1206 CE

Q14. Which of the following statements about Mahmud of Ghazni and Muhammad of Ghori is correct? (a) Both aimed to build a permanent empire in India from the start. (b) Mahmud of Ghazni's raids were mainly for plunder, while Muhammad of Ghori aimed at conquest and lasting control. (c) Muhammad of Ghori raided Somnath, while Mahmud of Ghazni fought the Battles of Tarain. (d) Both were father and son from the same Ghaznavid dynasty.

Q15. The "Prithviraj Raso," a heroic poem associated with Prithviraj Chauhan, was composed by: (a) Al-Biruni (b) Chand Bardai (c) Firdausi (d) Amir Khusrau

Answer Key

Q	Answer	One-line reason
1	(b)	Muhammad bin Qasim conquered Sindh in 712 CE.
2	(b)	Raja Dahir was the Sindh ruler defeated and killed by Qasim.
3	(b)	Hajjaj bin Yusuf, governor of Iraq, sent Qasim on the expedition.
4	(c)	Mahmud of Ghazni is traditionally said to have raided India 17 times.
5	(c)	The Somnath temple raid took place in 1025 CE.
6	(b)	Al-Biruni, who accompanied Mahmud, wrote Tahqiq-i-Hind.
7	(c)	Muhammad of Ghori fought and won the Second Battle of Tarain.
8	(b)	Prithviraj Chauhan won the First Battle of Tarain in 1191 CE.
9	(b)	The Second Battle of Tarain was fought in 1192 CE.
10	(b)	Qutb-ud-din Aibak led the Turkish forces at Chandawar in 1194 CE.
11	(a)	Correct order: Sindh (712) → Somnath (1025) → Second Tarain (1192) → Aibak as Sultan (1206).
12	(a)	Bakhtiyar Khalji conquered Bihar and Bengal and destroyed Nalanda.
13	(d)	Aibak became Sultan of Delhi in 1206 CE after Ghori's assassination.
14	(b)	Mahmud raided for wealth and prestige; Ghori aimed at permanent conquest.
15	(b)	Chand Bardai, Prithviraj's court poet, composed the Prithviraj Raso.