Anatolian beyliks (, Ottoman Turkish: Tavâif-i mülûk, Beylik ) were small principalities (or petty kingdoms) in Anatolia governed by beys, the first of which were founded at the end of the 11th century. A second more extensive period of foundations took place as a result of the decline of the Seljuq Sultanate of Rûm in the second half of the 13th century. One of the beyliks, that of the Osmanoğlu from the Kayi tribe of the Oghuz Turks, from its capital in Bursa completed its conquest of other beyliks by the late 15th century, becoming the Ottoman Empire. The word "beylik" denotes a territory under the jurisdiction of a bey, equivalent in other European societies to a lord. History Following the 1071 Seljuq victory over the Byzantine Empire at the Battle of Manzikert and the subsequent conquest of Anatolia, Oghuz clans began settling in present-day Turkey. The Seljuq Sultanate's central power established in Konya was largely the result of using these clans under Beys called uç bey or uj begi especially in border areas to ensure safety against the Byzantines; uç is a Turkish term for a border territory equivalent to marches, thus uç beyi is similar to margrave in Europe. These clans, led by beys, would receive military and financial aid from the Seljuqs in return for their services and full allegiance. Seljuq power deteriorated with the Mongol invasions from the east. The Ilkhanate commanders in Anatolia then gained strength and authority and this encouraged the beys to declare sovereignty. With the fall of Seljuq centralized power in Konya, many beys joined forces with the atabegs (former Seljuq leaders) and other religious Muslim leaders and warriors from Persia and Turkistan which were fleeing the Mongols that were invading the Byzantine empire. To maintain control of their new territory, these reestablished beys employed Ghazi warriors from Persia and Turkestan, who also fled the Mongols. The ghazis fought under the inspiration of either a mullah or a general, trying to assert Islamic power, their assaults of the reestablished beys upon the Byzantine Empire reaching even further expanded the power sphere of the beyliks. As the Byzantine empire weakened, their cities in Asia Minor could resist the assaults of the beyliks less and less, and many Turks gradually settled in the western parts of Anatolia. As a result, many more beyliks were founded in these newly conquered western regions who entered into