Delhi Sultanate

The Delhi Sultanate or the Sultanate of Delhi was a late medieval empire primarily based in Delhi that stretched over large parts of the Indian subcontinent for more than three centuries. The sultanate was established in 1206 in the former Ghurid territories in India. The sultanate's history is generally divided into five periods: Mamluk (1206–1290), Khalji (1290–1320), Tughlaq (1320–1414), Sayyid (1414–1451), and Lodi (1451–1526). It covered large swaths of territory in modern-day India, Pakistan, Bangladesh, as well as some parts of southern Nepal.

The foundation of the Sultanate was established by the Ghurid conqueror Muhammad Ghori, who routed the Rajput Confederacy, led by Ajmer ruler Prithviraj Chauhan, in 1192 near Tarain in a reversal of an earlier battle. As a successor to the Ghurid dynasty, the Delhi Sultanate was originally one of several principalities ruled by the Turkic slave-generals of Muhammad Ghori, including Taj al-Din Yildiz, Qutb ud-Din Aibak, Bahauddin Tughril and Nasir ad-Din Qabacha, that had inherited and divided the Ghurid territories amongst themselves. Khalji and Tughlaq rule ushered a new wave of rapid and continual Muslim conquests deep into South India. The sultanate finally reached the peak of its geographical reach during the Tughlaq dynasty, occupying most of the Indian subcontinent under Muhammad bin Tughluq. A major political transformation occurred across North India, triggered by the Central Asian king Timur's devastating raid on Delhi in 1398, followed soon afterwards by the re-emergence of rival Hindu powers such as Vijayanagara Empire and Kingdom of Mewar asserting independence, and new Muslim sultanates such as the Bengal and Bahmani Sultanates breaking off. In 1526, Timurid ruler Babur invaded northern India and conquered the Sultanate, leading to its succession by the Mughal Empire.

The establishment of the Sultanate drew the Indian subcontinent more closely into international and multicultural Islamic social and economic networks, as seen concretely in the development of the Hindustani language and Indo-Islamic architecture. It was also one of the few powers to repel attacks by the Mongols (from the Chagatai Khanate) and saw the enthronement of one of the few female rulers in Islamic history, Razia Sultana, who reigned from 1236 to 1240. During the sultanate's rule, there was no mass forcible conversion of Hindus, Buddhists, and other dharmic faiths, and Hindu officials and vassals were readily accepted. However, there were cases like Bakhtiyar Khalji's annexations, which involved a large-scale desecration of Hindu and Buddhist temples and the destruction of universities and libraries. Mongolian raids on West and Central Asia set the scene for centuries of migration of fleeing soldiers, intelligentsia, mystics, traders, artists, and artisans from those regions into the subcontinent, thereby establishing Islamic culture there.

Although conventionally named after its principal capital city, Delhi, the terminology applied to domains under Delhi Sultanate was often unspecified. It was called as "The Empire of Delhi" (Persian: Mamalik-i-Delhi) by Juzjani and Barani while Ibn Battuta called the empire under Muhammad bin Tughlaq as "Hind and Sind". The Delhi Sultanate was also known as the "Empire of Hindustan" (Persian: Mamalik-i-Hindustan), a name that gained currency during the period.

The rise of the Delhi Sultanate in India was part of a wider trend affecting much of the Asian continent, including the whole of southern and western Asia: the influx of nomadic Turkic peoples from the Central Asian steppes. This can be traced back to the 9th century when the Islamic Caliphate began fragmenting in the Middle East, where Muslim rulers in rival states began enslaving non-Muslim nomadic Turks from the Central Asian steppes and raising many of them to become loyal army slaves called Mamluks. Soon, Turks were migrating to Muslim lands and becoming Islamicized. Many of the Turkic Mamluk slaves eventually rose to become rulers and conquered large parts of the Muslim world, establishing Mamluk Sultanates from Egypt to present-day Afghanistan, before turning their attention to the Indian subcontinent.

It is also part of a longer trend predating the spread of Islam. Like other settled, agrarian societies in history, those in the Indian subcontinent have been attacked by nomadic tribes throughout its long history. In evaluating the impact of Islam on the subcontinent, one must note that the northwestern subcontinent was a frequent target of tribes raiding from Central Asia in the pre-Islamic era. In that sense, the Muslim intrusions and later Muslim invasions were not dissimilar to those of the earlier invasions during the 1st millennium.

By 962 AD, Hindu and Buddhist kingdoms in South Asia faced a series of raids from Muslim armies from Central Asia. Among them was Mahmud of Ghazni, the son of a Turkic Mamluk military slave, who raided and plundered kingdoms in northern India from east of the Indus river to west of the Yamuna river seventeen times between 997 and 1030. Mahmud of Ghazni raided the treasuries but retreated each time, only extending Islamic rule into western Punjab.

The series of raids on northern and western Indian kingdoms by Muslim warlords continued after Mahmud of Ghazni. The raids did not establish or extend the permanent boundaries of the Islamic kingdoms. In contrast, the Ghurid Sultan Mu'izz ad-Din Muhammad Ghori (commonly known as Muhammad of Ghor) began a systematic war of expansion into northern India in 1173. He sought to carve out a principality for himself and expand the Islamic world. Muhammad of Ghor created 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.