So what happened to his empire?
d. destroyed by muslim male aged 18-40
Manuel II Palaeologus was the second to last Byzantine Emperor. He actually was forced to act as a vassal to the Muslims. His entire life was one of intrigue and under the table dealings. Few had more insight into the Islamic psyche than he did. His 'Empire' was largly confined to Constantinople and a few coastal cities on the Black Sea. The assault on Asia Minor by Tamerlane for a time relieved the situation for Manuel but even then the tribute that was formerly paid to the Ottomans by the Byzantines was demanded by Tamerlane.