Hüseyin Hüsâmeddin Yasar, an early 20th century historian, wrote in his work Amasya Tarihi that his mother was Şahzade Hatun, daughter of Divitdar Ahmed Pasha.

The Byzantine Emperor had first secured a stipulation that Mustafa should, if successful, repay him for his liberation by giving up a large number of important cities.

Mustafa took refuge in the city of Gallipoli, but the sultan, who was greatly aided by a Genoese commander named Adorno, besieged him there and stormed the place.

Mustafa was taken and put to death by the sultan, who then turned his arms against the Roman emperor and declared his resolution to punish the Palaiologos for their unprovoked enmity by the capture of Constantinople.

The Anatolian states that had been constantly plotting against him — Aydinids, Germiyanids, Menteshe and Teke — were annexed and henceforth became part of the Ottoman Sultanate.

[9] When the Balkan front was secured, Murad II turned east to defeat Timur's son, Shah Rokh, and the emirates of Karamanid and Çorum-Amasya.

When Murad ascended the throne, he sought to regain lost Ottoman territories that had reverted to autonomy following his grandfather Bayezid I's defeat at the Battle of Ankara in 1402 at the hands of Timur.

[11] He drew from the noble behavior of the nameless Caliphs in the Battalname, an epic about a fictional Arab warrior who fought against the Byzantines, and modelled his actions on theirs.

"[11] In another instance, since the ghazi king is meant to be just and fair, when Murad took Thessalonica in the Balkans, he took care to keep the troops in check and prevented widespread looting.

[11] Murad II successfully painted himself as a simple soldier who did not partake in royal excesses, and as a noble ghazi sultan who sought to consolidate Muslim power against non-Muslims such as the Venetians and Hungarians.

"[11] Murad II's reign saw a period of great economic development, with an increase in trade and a considerable expansion of Ottoman cities.

[12] Bertrandon de la Broquière met with Murad II in Adrianople, and described him in the following terms:[13] In the first place, as I have seen him frequently, I shall say that he is a little, short, thick man, with the physiognomy of a Tartar.