 Complete the following phrase:  Owing to these events, the composition of the population had undergone ever since the second half of the medieval period a transformation so profound that the Armenians constituted, over the whole extent of their ancient homeland, no more than a quarter of the total inhabitants. Despite this they kept and defended factual autonomy in certain isolated areas like Sassoun, Shatakh, and parts of Dersim. An Armenian stronghold and a symbol of factual Armenian autonomy, Zeitoun Ulnia was located between the Six Vilayets and Cilicia, which also had a strong Armenian presence ever since the creation of the Principality and then Kingdom of Lesser Armenia. However, the destruction of the Kingdom by the Ramadanid tribe and the subsequent rule by Muslim powers such as the Dulkadirids, the Mamluks and the Ottomans led to ever increasing numbers of Muslims in the region until finally the 