Though Yahsha Bey, grandson of Mahommed Karaman Oghlu, had declared himself the successor of the Seljukian sultans, the princes of Aidin, Sarukhan, Menteshe, Kermian, Hamid, Tekke and Karassi declined to recognize his authority, and considered themselves independent, each in his own dominions.
In the same year Bey Shehr and other portions of the Hamid principality were acquired by purchase from their ruler Hussein Bey, as the Karamanian princes were beginning to cast covetous eyes on them; but the Karamanians were unwilling to resign their claims to be heirs of the Seljukian sultans, and not until the reign of Mahommed II.
Some years of strife followed between the sons of Bayezid, in which three of them fell; Mussa, seizing Adrianople, laid siege to Constantinople, and Manuel Palaeologus, the emperor, appealed for aid to Mahommed, the other son, who had established himself at Brusa.
In 1413 Mahommed defeated Mussa, and thus remained sole heir to Bayezid's throne; in seven or eight years he succeeded Mahom- in regaining all the territories over which his father med 1., had ruled, whereas Timur's empire fell to pieces 1413-1421.
Two years after his accession Mahommed overcame a rebellion of the prince of Karamania and recaptured his stronghold Konia (1416), and then, turning northwards, forced Mircea, voivode of Walachia, who in the dispute as to the succession had supported Prince Mussa, to pay tribute.