In 1389, just after the conquest of Bulgaria and Bosnia, Bayezid had been informed that; in Anatolia a chaotic situation had been appeared. He signed open-treaties with the Balkan States immediately, and returned to Anatolia. With the death of Sultan Murad I the Anatolian Clans had began to co-operate each other to attack the Ottomans.

Karamanogullari Clan invaded Beysehir, and began to provoke Saruhan, Mentese, Aydin and Germiyan Clans. Bayezid arrived Anatolia with Serbian forces and one by one he captured the lands of the rebelling clans. Candaroglu Isfendiyar had accepted the supremecy of the Ottoman Sultan.

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