Sheikhdom of Kuwait In the early 20th century, Kuwait immensely declined in regional economic importance, mainly due to many trade blockades and the world economic depression. Before Mary Bruins Allison visited Kuwait in 1934, Kuwait lost its prominence in long distance trade. During World War I, the British Empire imposed a trade blockade against Kuwait because Kuwait's ruler (Salim Al-Mubarak Al-Sabah) supported the Ottoman Empire, who was in the Central Powers. The British economic blockade heavily damaged Kuwait's economy. The Great Depression negatively impacted Kuwait's economy starting in the late 1920s. International trading was one of Kuwait's main sources of income before oil.
Anglo-Ottoman Convention of 1913 traffic and maritime peace, and also sought to formally establish its dominance in the Gulf. By 6 May 1913 Britain and the Ottoman Empire initialed the compromise and the Anglo-Ottoman Convention was signed on 29 July 1913, exactly two years after the first memorandum. The Anglo-Ottoman Convention was only part of a wider bargaining process and the complexities of the competing European commercial interests in the region prevented its ratification. Russia, France, and Germany (and later Italy) also had been pressing the Ottoman government for railway concessions. Ratification was further complicated by the fact that most of the Powers themselves