Najd Sanjak an autonomous separate country within the empire. The sultan recognized Abdullah II Al-Sabah as the kaymakam of Kuwait as a subprovince of al-Ahsa, formally acknowledging that Kuwait was a part of the Ottoman Empire and that it was ruled by the Sabah family. In 1913 Ibn Saud launched an attack on Hofuf, where 1,200 Turkish troops had been stationed since the province's annexation in 1870. The Ottoman garrison was expelled from Hasa, and the territory fell to the Al Saud. Even after the conquest of Hasa, Britain considered Ibn Saud to be an Ottoman vassal, and the Anglo-Ottoman Convention of
Anglo-Ottoman Convention of 1913 traffic and maritime peace, and also sought to formally establish its dominance in the Gulf. By 6 May 1913 Britain and the Ottoman Empire initialed the compromise and the Anglo-Ottoman Convention was signed on 29 July 1913, exactly two years after the first memorandum. The Anglo-Ottoman Convention was only part of a wider bargaining process and the complexities of the competing European commercial interests in the region prevented its ratification. Russia, France, and Germany (and later Italy) also had been pressing the Ottoman government for railway concessions. Ratification was further complicated by the fact that most of the Powers themselves