He was born in 1377. He was the son of Bayezid I. He was appointed to Manisa and Balikesir as the governor. He marched on the Bulgarians in 1393 and captured Tirnova on 17^th July 1393, then he captured Silistre, Nigbolu, and Vidin. He put an end to the Bulgarian Kingdom. He was appointed as the Kastamonu governor. He forced the Akkoyunlu State to leave Erzincan. He invaded Sivas, Tokat, Kayseri, and Aksaray. He was appointed as the Sivas governor. He withdrew against Timur who was marching through Sivas with a huge army, in 1400. Suleyman Chelebi begun to dominate the Karasi, Aydin, and Saruhan States.

He managed to reach Istanbul after the loss of Ankara Battle in 1402. He declared his loyalty to Timur. He was appointed as the Ottoman Sultan of Roumelia. He signed the Gallipoli Agreement with Manuel II the Byzantine Empire and gave Kartal, Pendik, and the Gebze islands, a part of the Black Sea and he took the necessary support to sovereign the Ottoman lands. He signed an agreement with Venice and Geneoise on 3^rd June 1403. Afterwards, he declared his sovereignty in Edirne.

He fought with his brothers Isa and Mehmed Chelebi for the throne. Isa Chelebi was defeated in Ulubas War and he escaped to Istanbul. Suleyman Chelebi took his brother from the Byzantine Emperor and sent him Anatolia with a new army in 1404. Isa Chelebi lost all the wars he made with Mehmed Chelebi and he was killed. Suleyman Celebi captured Bursa and Ankara. He besieged Sivrihisar dominated by the Karamanoglu State. Chelebi Mehmed allied with Karamanoglu Mehmed Bey against Suleyman Chelebi.

He made many wars with his other brother Musa who was more powerful and he lost. Suleyman was caught by Musa and killed (18^th May 1410).

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