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 intervene in matters of the Gulf, of which the British desired to retain a monopoly. The Ottomans were willing to drop all claims to Bahrain, in which they had never been able to maintain anything but a symbolic role, but not Qatar. As a question of sovereignty, the Ottomans argued that the empire had always exercised effective sovereignty over the peninsula and could not justify the abandonment of territory which it had never formally renounced. Yet under considerable pressure it renounced claims to both (Articles 11 & 13) and a blue line was established to define the territorial limits of