[2] Following the 1071 Seljuk victory over the Byzantine Empire at the Battle of Manzikert and the subsequent conquest of Anatolia, Oghuz Turkic clans began settling in present-day Turkey.
The Seljuk Sultanate of Rum's central power established in Konya was largely as a result of using these clans under appointed beys called uç bey or uj begi (especially in border areas to ensure safety against the Byzantines); uç is a Turkish term that denotes a border or frontier territory equivalent to marches, with the similar term margrave used in other parts of Europe.
The Ilkhanate commanders in Anatolia then gained strength and authority which encouraged the beys, who had until then been vassals to the Sultanate of Rum, to declare sovereignty over their dominions.
[citation needed] As the Byzantine Empire weakened, their cities in Asia Minor became gradually less and less able to resist these attacks, and many Turks began to settle in western parts of Anatolia.
The Beylik of Osmanoğlu, who would later go on to become the Ottoman Empire, was situated in the northwest, around Söğüt, and was at that stage relatively small and possessed modest military power.
The final blow to the Beylik of Karaman was struck by Mehmed II, who conquered their lands and re-assured a homogeneous rule in Anatolia.
A second group beyliks emerged as a result of the weakening of this central state under the Mongol blow with the Battle of Köse Dağ in 1243, which had the indirect consequence of extending Turkic territory in Western Anatolia toward the end of the 13th century.
Especially wandering traditional crafts artists and architects helped spread these new trends and localized styles to several beyliks across Anatolia, which resulted in innovative and original works particularly in architecture.