Turkish Advance & Ghurian Invasions (10th-12th C.)

Context: The internal exhaustion of the Tripartite powers left a vacuum in North India.
Key Factor: Superior mobility (Central Asian horses with stirrups) and the Iqta system of military financing.

1. Mahmud of Ghazni (999-1030 CE)

The Raider: Conducted 17 raids into India. His primary goal was Plunder to finance his Central Asian empire, not permanent occupation.
Major Target: Somnath (1025) – its destruction had immense symbolic and economic fallout.
Cultural Impact: Patronized Al-Beruni (Kitab-ul-Hind), the first foreigner to provide a deep, objective study of Indian sciences and society.

2. Muhammad Ghori (Muizzuddin)

The Conqueror: Unlike Mahmud, Ghori aimed for permanent territory.
Tarain I (1191): Prithviraj Chauhan won, but allowed Ghori to escape.
Tarain II (1192): Turning Point. Ghori used superior tactics and archers to defeat Prithviraj.
Chandawar (1194): Defeated Jai Chand (Gahadavala), solidifying control over the Ganga Valley.

3. Eastern Advance (Bakhtiyar Khalji)

Nalanda Destruction: Khalji destroyed Nalanda (1202) mistakenly thinking it was a fortified military camp.
Bengal: Captured Nadia (Sena capital); King Lakshman Sena fled.

4. Reasons for Turkish Success

Military: Use of the Iron Stirrup allowed the Turks to fire arrows accurately from horseback while charging.
Social: R.S. Sharma argues the caste-based exclusivity of the Rajputs limited their pool of warriors, while the 'Sultanate's Islam' provided more egalitarian mobilization within its ranks.
Political: Fragmentation of Indian Samantas prevented a unified response to the agile Turkish cavalry.

5. Top UPSC Traps (Caution)

Mahmud of Ghazni: He did NOT found the Delhi Sultanate; he only established a frontier garrison in Lahore.
Prithviraj Chauhan: He was not the 'last Hindu King' of India, just the last major ruler of the Delhi region before the Sultanate.
Battle of Tarain II: This is the single most important date in medieval history as it ends the "Rajput Era" of North India.