Great Britain and the Iraqi oil industry war, but for production in the civilian economy. Britain had to turn elsewhere to address its growing oil needs. As Kaiser Wilhelm I and the Ottoman sultan struggled to reassert Ottoman dominion over the Sheikhdom of Kuwait, the British viceroy of the colonial government in India entered into an agreement with Sheikh Mubarak Al-Sabah which created a British protectorate in Kuwait. Britain needed a supply of petroleum which was not controlled by contemporary rivals such as Russia, Germany, or the Netherlands. British Admiral John Fisher wanted to replace Britain's coal-burning naval vessels with fuel-burning ships. This shift was crucial for
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