The Delhi Sultanate and later Mughal Empire ruled the region. The region became predominantly Muslim during the rule of Delhi Sultanate and later Mughal Empire. It was reconquered by Rai Qutb of the Gujarat Sultanate. The Swahili coast eventually became part of the Sultanate of Oman. Thus transforming into the independent Sultanate of Brunei. The slave trade flourished due to strengthening ties with the Mamluk Sultanate. It progressed during the Indian sultanate and mughal periods. In 1698, Zanzibar came under the influence of the Sultanate of Oman. The rest was the territory of the Sultanate of Brunei. The region was annexed by the Delhi Sultanate. He consolidated his dominions as the Sultanate of Nejd. The Mongols withdrew after plundering and stopped raiding northwest parts of the Delhi Sultanate. No individual from the Bengal Sultanate and Mughal Bengal were nominated however. By then Singapore was nominally part of the Johor Sultanate. The Sultanate of Aussa (Afar Sultanate) succeeded the earlier Imamate of Aussa.