The Islamic Sultanates

After conquering Persia, Islamic Caliphate incorporated parts of what is now Pakistan around 720 CE. They were keen to invade India[49], which was the richest classical civilization[50], with a flourishing international trade and the only known diamond mines in the world. After several wars over three centuries between various north Indian kingdoms and the Caliphate, short lived Islamic empires (Sultanates) were established and spread across the northern subcontinent over a period of a few centuries. But, prior to Turkic invasions, Muslim trading communities had flourished throughout coastal South India, particularly in Kerala, where they arrived in small numbers, mainly from the Arabian peninsula, through trade links via the Indian Ocean. However, this had marked the introduction of an Abrahamic Middle Eastern religion in Southern India's pre-existing Indian religions, often in puritanical form. Later, the Bahmani Sultanate and Deccan Sultanates flourished in the south.