sentences:  Also, in the first two decades of the 20th century, there were massacres of Greeks, Slavs, and Armenians in the Ottoman Empire, culminating in the Armenian, Greek and Assyrian genocides.As a result, the 20th century saw a sharp decline of the number of Orthodox Christians, and of Christians in general, in the Anatolian peninsula amidst complaints of Turkish governmental repression of various Eastern and Oriental Orthodox groups.During the Lausanne Conference in 1923, the Turkish and Greek sides after some discussions accepted the proposal of a population exchange.