Decline and modernization of the Ottoman Empire
Beginning from the late eighteenth century, the Ottoman Empire faced challenges defending itself against foreign invasion and occupation. In response to foreign threats, the empire initiated a period of tremendous internal reform which came to be known as the Tanzimat, which succeeded in significantly strengthening the Ottoman central state, despite the empire's precarious international position. Over the course of the nineteenth century, the Ottoman state became increasingly powerful and rationalized, exercising a greater degree of influence over its population than in any previous era. The process of reform and modernization in the empire began with the declaration of the Nizam-ı Cedid (New Order) during the reign of Sultan Selim III and was punctuated by several reform decrees, such as the Hatt-ı Şerif of Gülhane in 1839 and the Hatt-ı Hümayun in 1856. At the end of this period, marked with 1908, to a degree the Ottoman military became modernized and professionalized according to the model of Western European Armies. The period was followed by the defeat and dissolution of the Ottoman Empire (1908–1922).
Territorial evolution of the Ottoman Empire
The Treaty of Sèvres (August 10, 1920) was the peace treaty between the Ottoman Empire and Allies at the end of World War I. The Treaty of Versailles was signed with Germany before this treaty to annul the German concessions including the economic rights and enterprises. Also, France, Great Britain and Italy signed a secret "Tripartite Agreement" at the same date. The Tripartite Agreement confirmed Britain's oil and commercial concessions and turned the former German enterprises in the Ottoman Empire over to a Tripartite corporation. The open negotiations covered a period of more than fifteen months, beginning at the Paris Peace Conference. The negotiations continued at the Conference of London, and took definite shape only after the premiers' meeting at the San Remo conference in April 1920. France, Italy, and Great Britain, however, had secretly begun the partitioning of the Ottoman Empire as early as 1915. The delay was due to the fact that the powers could not come to an agreement which, in turn, hinged on the outcome of the Turkish national movement. The Treaty of Sèvres was annulled in the course of the Turkish War of Independence and the parties signed and ratified the superseding Treaty of Lausanne in 1923.
The Treaty of Lausanne (July 24, 1923) was a peace treaty signed in Lausanne, Switzerland, that settled the Anatolian and East Thracian parts of the partitioning of the Ottoman Empire by annulment of the Treaty of Sèvres (1920) that was signed by the Constantinople-based Ottoman government; as the consequence of the Turkish War of Independence between the Allies of World War I and the Ankara-based Grand National Assembly of Turkey (Turkish national movement) led by Mustafa Kemal Atatürk. The treaty also led to the international recognition of the sovereignty of the new Republic of Turkey as the successor state of the defunct Ottoman Empire.