Analysis of information sources in references of the Wikipedia article "고르 제국" in Korean language version.
In the winter of A.D. 1194–1195 Shihabuddin once more marched into Hindustan and invaded the doab. Rai Jaichand moved forward to met him....then description of Chandwar struggle (...) Shihabuddin captured the treasure fort of Asni and then proceeded to Benaras, 'where he converted about thousand idol-temples into house for the Musalmans.
The dynamics of north Indian politics changed dramatically, however, when the Ghurids, a dynasty of Tajik (eastern Iranian), origina arrived from central Afghanistan towards the end of twelfth century
At this juncture Sultan Ghiyasuddin Ghuri died at Herat on 27 Jamadi I.A H 599 (13 March A.D 1203)
Obverse: horseman to left holding a mace, margin with date in Nagari Samvat 1262 Bhadrapada . Reverse : legend in Nagari śrīmat mahamada sāmaḥ . Issued in AD 1204
"The first battle of Tarain was won by the Rajput confederacy led by Prithviraj Chauhan of Ajmer. But when Muhammad of Ghur returned the following year with 10,000 archers on horseback he vanquished Prithviraj and his army
And then, in 1193, Qutb-ud-din Aibek, the military commander of Muhammad of Ghor's army, marched towards Varanasi, where he is said to have destroyed idols in a thousand temples. Sarnath very likely was among the casualties of this invasion, one all too often seen as a Muslim invasion whose primary purpose was iconoclasm. It was of course, like any premodern military invasion, intended to acquire land and wealth
After the arrival of Islam, the universities such as Nalanda and Vikramshila were no longer existent. The destruction of Nalanda by Bakhtiyar Khalji was the last nail in this pre-Islamic Indic university, which had survived three major destructions
The Turkish arms penetrated into Bihar and Bengal, through the enterprising efforts of Ikhtiyaruddin Muhammad bin Bakhtiyar Khalji ... he started plundering raids into Bihar and, within four or five years, occupied a large part of it ... Nadia was sacked by the Turks and a few districts of Bengal (Malda, Dinajpur, Murshidabad and Birbhum) were occupied by them ... Bathtiyar Khalji could not retain his hold over Nadia and made Lakhnauti or Gaur as his capital.
Ḡazna and Bost suffered frightful sackings by ʿAlāʾ-al-Dīn Ḥosayn, in which colleges and libraries were despoiled, and the buildings of previous sultans destroyed (Jūzjānī, pp. 343-45; Čahār maqāla, ed. Qazvīnī, p. 31), earning him the uneviable epithet of Jahānsūz (world incendiary).
In the west, Ḡīāṯ-al-Dīn, often in concert with his brother, extended his suzerainty over the maleks of Nīmrūz or Sīstān and even over the Kermān branch of the Saljuqs.
ʿAlāʾ-al-Dīn Ḥosayn’s expansionist policies raised the Ghurids into a power of significance well beyond Ḡūr itself. Latterly, he was able to take advantage of a certain power-vacuum in the eastern Islamic world which had arisen through the decay of the Ghaznavids and the collapse of Saljuq power in Khorasan consequent on Sanjar’s defeat and capture by the Ḡozz (q.v.) in 548/1153.
The actual fighting in Khorasan at this time was largely between the Ghurids and Tekeš’s brother Solṭānšāh, who had carved out for himself personally a principality in western Khorasan, until in 586/1190. Ḡīāṯ-al–Dīn and Moʿezz-al-Dīn defeated Solṭānšāh near Marv in 588/1192, captured him, and took over his territories (Jūzjānī, I, 303-4, tr. I, pp. 246-47). When Tekeš died in 596/1200 (Ebn al-Aṯīr, Beirut, XII, pp. 156-58), Ḡīāṯ-al-Dīn was able to take over most of the towns of Khorasan as far west as Besṭām in Qūmes.
The Ghurids adopted the role of defenders of Sunnism. They had cordial relations with the ʿAbbasids in Baghdad, frequently exchanging embassies (Jūzjānī’s father took part in one of the last, Jūzjānī, I, p. 361, tr. p. 383). Ḡīāṯ-al-Dīn was admitted to al-Nāṣer’s fotūwa order, and the caliph more than once urged the Ghurids to halt the advance into western Persia of the Ḵᵛārazmšāhs (Jūzjānī, I, 302, tr. I, p. 243).
At the time that this ewer and the group of long-necked ewers to which it relates were produced, Herat was under the control of the Ghurids, not the Seljuqs, but evidence strongly suggests that these pieces were exported to centers in Seljuq Iran and elsewhere.
At this juncture Sultan Ghiyasuddin Ghuri died at Herat on 27 Jamadi I.A H 599 (13 March A.D 1203)
Tradition gives him credit for the conquest of Bengal but as a matter of fact he could not subjugate the greater part of Bengal ... All that Bakhtyār can justly take credit for is that by his conquest of Western and a part of Northern Bengal he laid the foundation of the Muslim State in Bengal. The historians of the 13th century never attributed the conquest of the whole of Bengal to Bakhtyār.
The Turkish arms penetrated into Bihar and Bengal, through the enterprising efforts of Ikhtiyaruddin Muhammad bin Bakhtiyar Khalji ... he started plundering raids into Bihar and, within four or five years, occupied a large part of it ... Nadia was sacked by the Turks and a few districts of Bengal (Malda, Dinajpur, Murshidabad and Birbhum) were occupied by them ... Bathtiyar Khalji could not retain his hold over Nadia and made Lakhnauti or Gaur as his capital.
