to protect Bahrain from British aggression. As a result, the Government of British India eventually overpowered Bahrain. Colonel Pelly signed an agreement with Sheikh Mohammad in May 1861 and later with his brother Sheikh Ali that placed Bahrain under British rule and protection. In 1868, following the Qatari–Bahraini War, British representatives signed another agreement with the Al Khalifa rulers, making Bahrain part of the British protectorate territories in the Persian Gulf. It specified that the ruler could not dispose of any of his territory except to the United Kingdom and could not enter into relationships with any foreign government without British consent. In return the British promised to protect Bahrain from all aggression by sea and to lend support in case of land attack. More importantly the British promised to support the rule of the Al Khalifa in Bahrain, securing its unstable position as rulers of the country. Other agreements in 1880 and 1892 sealed the protectorate status of Bahrain to the British. Economic prosperity Peace and trade brought a new prosperity. Bahrain was no longer dependent upon pearling, and by the mid-19th century, it became the pre-eminent trading centre in the Persian Gulf, overtaking rivals Basra, Kuwait, and finally in the 1870s, Muscat. At the same time, Bahrain's socio-economic development began to diverge from the rest of the Persian Gulf: it transformed itself from a tribal trading centre into a modern state. This process was spurred by the attraction of large numbers of Persian, Huwala, and Indian merchant families who set up businesses on the island, making it the nexus of a vast web of trade routes across the Persian Gulf, Persia and the Indian sub-continent. A contemporary account of Manama in 1862 found: Mixed with the indigenous population [of Manamah] are numerous strangers and settlers, some of whom have been established here for many generations back, attracted from other lands by the profits of either commerce or the pearl fishery, and still retaining more or less the physiognomy and garb of their native countries. Thus the gay-coloured dress of the southern Persian, the saffron-stained vest of Oman, the white robe of Nejed, and the striped gown of Bagdad, are often to be seen mingling with the light garments of Bahreyn, its blue and red turban, its white silk-fringed cloth worn Banian fashion round the waist, and its frock-like overall; while a small but unmistakable colony of Indians, merchants