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).
History of the Balkans
Much of the Balkans was under Ottoman rule throughout the Early modern period. Ottoman rule was long, lasting from the 14th century up until the early 20th in some territories. The Ottoman Empire was religiously, linguistically and ethnically diverse, and, at times, a much more tolerant place for religious practices when compared to other parts of the world. The different groups in the empire were organised along confessional lines, in the so-called the Millet system. Among the Orthodox Christians of the empire (the Rum Millet) a common identity was forged based on a shared sense of time defined by the ecclesiastical calendar, saint's days and feasts.