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).
Historiography of the fall of the Ottoman Empire
Many twentieth-century scholars argued that power of the Ottoman Empire began waning after the death of Suleiman the Magnificent in 1566, and without the acquisition of significant new wealth the empire went into decline, a concept known as the Ottoman Decline Thesis. Since the late 1970's, however, historians increasingly came to question the idea of Ottoman decline, and now there is a consensus among academic historians that the Ottoman Empire did not decline.