power struggles with the Byzantines, the Genoese, the Knights Templar as well as between each other. By 1300, Turks had reached the Aegean coastline, held momentarily two centuries before. In the beginning, the most powerful states were the Karamanids and the Germiyanids in the central area. The Beylik of Osmanoğlu Dynasty who were later to found the Ottoman Empire was situated to the northwest, around Söğüt, and was a small and at that stage, insignificant power. Along the Aegean coast, from north to south, stretched Karasids, Sarukhanids, Aydinids, Menteşe and Teke principalities. The Jandarids (later called Isfendiyarids) controlled the Black Sea region around Kastamonu and Sinop. Under its eponymous founder, Osman I, the Beylik of Osmanoğlu expanded at Byzantine expense south and west of the Sea of Marmara in the first decades of the 14th century. With their annexation of the neighboring Beylik of Karasi and their advance into Roumelia as of 1354, they soon became strong enough to emerge as the main rivals of Karamanids, who at that time were thought to be the strongest. Towards the end of the 14th century, the Ottomans advanced further into Anatolia by acquiring towns, either by buying them off or through marriage alliances. Meanwhile, the Karamanids assaulted the Ottomans many times with the help of other beyliks, Mamluks, Aq Qoyunlu ("White Sheep Turkomans"), Byzantines, Pontics and Hungarians, failing and losing power every time. By the close of the century, the early Ottoman leaders had conquered large parts of land from Karamanids and other less prominent beyliks. These had a short respite when their territories were restored to them after the Ottoman defeat suffered against Tamerlane in 1402 in the Battle of Ankara. But the Ottoman state quickly collected itself under Mehmed I and his son Murad II, who re-incorporated most of these beyliks into Ottoman territory in a period of about 25 years. The final blow for the Karamanids was struck by Mehmed II who conquered their lands and re-assured a homogeneous rule in Anatolia. The further steps towards a single rule by the Ottomans were taken by Selim I who conquered territories of Ramadanids and Dulkadirids in 1515 during his campaign against the Mamluks, and his son Süleyman the Magnificent who more or less completely united the present territories of Turkey (and much more) in his 1534 campaign. Many of the former Anatolian beyliks became the basis for administrative subdivisions in