Defeat and Dismantlement of the Ottoman Empire Over the course of histry The Ottoman Empire was the one of the largest and longest lasting Empires in history. The empire exapanded at rapid pace , making it one of the well known empire sin modern time. The ottomans expansion began when the Christian empire began to perish. In the thirteenth century, as the power of the small Turks declined, the Ottoman Turks began to absorb their small states with their strong ilaray force known as the jansorries.. By the fourteenth century, the Ottomans had taken over took over some of the Byzantine Empire 's territories and, late in that century, several Balkan states. Under Selim I and Süleyman I (the Magnificent), the Ottomans brought Hungary and much of