Rise of the Ottoman Empire
The foundation and rise of the Ottoman Empire is a period of history that started with the emergence of the Ottoman principality in , and ended with the conquest of Constantinople on May 29, 1453. This period witnessed the foundation of a political entity ruled by the Ottoman Dynasty in the northwestern Anatolian region of Bithynia, and its transformation from a small principality on the Byzantine frontier into an empire spanning the Balkans and Anatolia. For this reason, this period in the empire's history has been described as the Proto-Imperial Era. Throughout most of this period, the Ottomans were merely one of many competing states in the region, and relied upon the support of local warlords and vassals to maintain control over their realm. By the middle of the fifteenth century the Ottoman sultans were able to accumulate enough personal power and authority to establish a centralized imperial state, a process which was brought to fruition by Sultan Mehmed II (r. 1451-1481). The conquest of Constantinople in 1453 is seen as the symbolic moment when the emerging Ottoman state shifted from a mere principality into an empire, marking a major turning point in its history.
Kemalism
Many of the root ideas of Kemalism began during the late Ottoman Empire under various reforms to avoid the imminent collapse of the Empire, beginning chiefly in the early 19th-century Tanzimat reforms. The mid-century Young Ottomans attempted to create the ideology of Ottoman nationalism, or Ottomanism, to quell the rising ethnic nationalism in the Empire and introduce limited democracy for the first time while maintaining Islamist influences. In the early 20th century, Young Turks abandoned Ottoman nationalism in favor of early Turkish nationalism, while adopting a secular political outlook. After the demise of the Ottoman Empire, Atatürk, influenced by both the Young Ottomans and the Young Turks, as well as by their successes and failures, led the declaration of the Republic of Turkey in 1923, borrowing from the earlier movements' ideas of secularism and Turkish nationalism, while bringing about, for the first time, free education and other reforms that have been enshrined by later leaders into guidelines for governing Turkey.