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Ans.
By 962 AD, Hindu and Buddhist kingdoms in South Asia were under a wave of raids from Muslim armies from Central Asia.Among them was Mahmud of Ghazni, who raided and plundered kingdoms in north India from east of the Indus river to west of Yamuna river seventeen times between 997 and 1030.Mahmud of Ghazni raided the treasuries but retracted each time, only extending Islamic rule into western Punjab.
The wave of raids on north Indian and western Indian kingdoms by Muslim warlords continued after Mahmud of Ghazni. The raids did not establish or extend permanent boundaries of their Islamic kingdoms. The Ghurid sultan Mu'izz ad-Din Muhammad Ghori, commonly known as Muhammad of Ghor, began a systematic war of expansion into north India in 1173.He sought to carve out a principality for himself by expanding the Islamic world.Muhammad of Ghor sought a Sunni Islamic kingdom of his own extending east of the Indus river, and he thus laid the foundation for the Muslim kingdom called the Delhi Sultanate.Some historians chronicle the Delhi Sultanate from 1192 due to the presence and geographical claims of Muhammad Ghori in South Asia by that time.
Ghori was assassinated in 1206, by Ismāʿīlī Shia Muslims in some accounts or by Hindu Khokhars in others. After the assassination, one of Ghori's slaves the Turkic Qutb al-Din Aibak, assumed power, becoming the first Sultan of Delhi.