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
Rise of the Ottoman Empire while others remained Christian. Of great symbolic importance for Ottoman centralization was the practice whereby Ottoman rulers would customarily stand upon hearing the sound of martial music, indicating their willingness to participate in "gaza". Shortly after the Conquest of Constantinople in 1453, Mehmed II discontinued this practice, indicating that the Ottoman ruler was no longer a simple frontier warrior, but the sovereign of an empire. The empire's capital was shifted from Edirne, the city symbolically connected with the frontier warrior ethos of "gaza", to Constantinople, a city with deeply imperial connotations due to its long history as the capital of