Sheikhdom of Kuwait (provincial sub-governors) of the Ottoman government. The independence of Kuwait was also highlighted by the statement made by Sheikh Mubarak Al-Sabah to the German team who requested an audience with him over the extension of the Berlin-Baghdad railway to Kuwait in which Mubarak said that he would not sell or rent any piece of his land to a foreigner, and that he did not acknowledge the authority of the Ottomans over Kuwait. The convention ruled that Shaikh Mubarak had independent authority over an area extending out to a radius of 80 km, from the capital. This region was marked by
Rise of the Ottoman Empire judge ("Kazasker") was created, indicating an increasing level of social stratification between the emerging military-administrative class ("askeri") and the rest of society. Murad I also instituted the practice of appointing particular frontier warriors as "Lords of the Frontier" ("uc begleri"). Such power of appointment indicated that the Ottoman rulers were no longer merely "primus inter pares" but sat at the top of a hierarchy of leadership. As a way of openly declaring this new status, Murad became the first Ottoman ruler to adopt the title of sultan. Beginning at the latest by the 1430s, but most likely earlier, the Ottomans