Mubarak Al-Sabah of Mubarak's supposed assassination plot spread throughout the Ottoman Empire and abroad, which proved a serious obstacle in establishing his legitimacy as a ruler. Mubarak acted quickly to bribe the Ottoman bureaucracy through lavish gift giving in order to gain support for his appointment as kaymakam [sub governor] of Kuwait like his previous brothers. This is further illustrated through a memorandum by Captain J.F. Whyte, a British agent stationed in Basra: “Sheikh Mubarak has, since his usurpation, been employing his late brother’s wealth to secure his recognition as Sheikh and his appointment as Kaimakam of Koweit by the Sublime Porte.”
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