Anglo-Ottoman Convention of 1913 was to have “complete administrative autonomy.” This region was formed by “a semicircle with the town of Kuwayt in the center, the Khawr al-Zubayr at the northern extremity and al-Qurrayin at the southern extremity” (Article 5). This also included the surrounding islands of Warba and Bubiyan, which were major bargaining points for the British who viewed the Ottoman military posts on the islands as a threat. The green line defined the region in which the Sheikh of Kuwait would exercise the administrative rights of an Ottoman "kaymakam". The tribes situated in that area were “recognized within the dependence of the
Bahrain administrative reforms of the 1920s in "prosecution of war, piracy and slavery at sea" and Britain was to provide maritime protection. The treaty also recognized the Al Khalifa ruler as an "independent ruler". Six years later, in 1867–8, the British navy intervened after a Bahraini attack on Qatar. After two years, in 1869, they intervened again to end an internal struggle over power, and appointed Shaikh Isa ibn Ali Al Khalifa, then aged 21 as ruler of Bahrain. In subsequent years, the British exercised increasing control over Shaikh Isa's communications with foreign powers, especially the Ottomans, who had claims over Bahrain and Qatar. The increasing