The southeastern
Persian Gulf coast was called the "
Pirate Coast" by the British, who argued that raiders based there—particularly the 'Qawasim' or 'Joasmees', now known as the
Al Qasimi (the ruling families of
Sharjah and
Ras Al Khaimah)—harassed British-flagged shipping. The first in a long series of maritime skirmishes between the Al Qasimi and British vessels took place in 1797, when the British-flagged
snow (a large two-masted ship)
Bassein was seized and released two days later. The cruiser
Viper was subsequently attacked off
Bushire. The Al Qasimi leader,
Saqr bin Rashid Al Qasimi, claimed innocence in both cases. On 11 January 1820, again at Ras Al Khaimah, Shakhbut bin Diyab Al Nahyan signed on behalf of his son, Tahnoon, the Sheikh of the Bani Yas and ruler of Abu Dhabi. Husain bin Ali of Rams signed on 15 January 1820. The uncle of Muhammad bin Hazza of Dubai signed on 28 January 1820 in Sharjah. The rulers of Ajman and Umm Al Quwain acceded to the full treaty on 15 March 1820, signing on board the ship of the commander of the British expeditionary force, Major-General
William Keir Grant. The treaty was also signed, at Sharjah, by the emir of Bahrain. The Sheikh of
Rams lost the support of his people soon after and both he and the Sheikh of
Jazirah Al Hamrah were deposed and their communities became subject to the rule of Ras Al Khaimah. Separate treaties in 1847 and 1856 saw treaties undertaking the abolition of slave trading and, in 1873, a further treaty abolishing slaving was signed by Sharjah and Abu Dhabi. == 1892 Exclusive Agreement ==