After the Battle of Ankara in which Beyazıt I was defeated by Tamerlane, Musa as well as Beyazıt himself was taken as a prisoner of war by Tamerlane.
Setelah Pertempuran Ankara dimana Beyazıt I dikalahkan oleh Tamerlane, Musa serta Beyazıt sendiri dijadikan tahanan perang oleh Tamerlane.