Mubarak Al-Sabah included other pressures and troubles for the Ottoman Empire including the British lobbying on Kuwait's behalf, led to the Anglo-Ottoman Convention of 1913, which recognized Kuwait as an autonomous "kaza" of the Ottoman Empire within the Green zone outlined in the map as well as an independent entity within the red zone outlined in the map. By the time World War I began Mubarak closely sided with the British against the Ottomans, and the 1913 Convention was rendered null. In support of the war effort Mubarak sent a force to Umm Qasr, Safwan, Bubiyan, and Basra to expel the Ottomans
Anglo-Ottoman Convention of 1913 post office, as well as land concessions made by the Sheikh to the British government (Article 3). Smaller provisions were also added at the convention, which included the Sheikh’s right to his private property in the vilayet of Basra (Article 9) and extradition (Article 10). Section II and III constitute provisions for Qatar and Bahrain, respectively. Central to the negotiations was the status of Qatar and Bahrain, and the British pressured the Ottoman government that it should renounce its claims to both. If the Ottoman government retained sovereignty over Qatar and Bahrain that would enable it the right to still