The document provides an overview of Turkish history from the 11th century origins of the Ottoman Empire through the establishment of the modern Republic of Turkey. It summarizes the rise and expansion of the Ottoman Empire between the 12th-15th centuries, its peak in the 15th-16th centuries, and then periods of stagnation, decline, and loss of territory through the 19th-20th centuries. It highlights Mustafa Kemal Atatürk's leadership of the Turkish War of Independence after World War I that established the Republic of Turkey in 1923 and his subsequent reforms that modernized and secularized Turkey.