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).
Europe
In parallel, the Eastern Question grew more complex ever since the Ottoman defeat in the Russo-Turkish War (1768–1774). As the dissolution of the Ottoman Empire seemed imminent, the Great Powers struggled to safeguard their strategic and commercial interests in the Ottoman domains. The Russian Empire stood to benefit from the decline, whereas the Habsburg Empire and Britain perceived the preservation of the Ottoman Empire to be in their best interests. Meanwhile, the Serbian revolution (1804) and Greek War of Independence (1821) marked the beginning of the end of Ottoman rule in the Balkans, which ended with the Balkan Wars in 1912-1913. Formal recognition of the "de facto" independent principalities of Montenegro, Serbia and Romania ensued at the Congress of Berlin in 1878.