In 210 AH al-Maʾmun consummated his marriage to Buran, the daughter of al-Hasan ibn Sahl, at Wasit. He remained there with his army for seventeen days. The expenses that al-Hasan laid out for the wedding and its attendant festivities came to fifty million dirhams; al-Maʾmun therefore granted him a city and presented him with five hundred thousand dinars (1).

In 211 AH Ibn Tahir subdued the men who had taken power in Egypt and captured a number of them (2).

In 212 AH Muhammad ibn Humayd al-Tusi marched out to fight Babak. That same year al-Maʾmun openly declared Ali superior to the two Shaykhs and maintained that the Quran is created. He appointed his brother al-Muʿtasim over Egypt and Syria; al-Muʿtasim executed some people, brought Egypt to order, and engagements with Babak took place several times (3).

In 215 AH al-Maʾmun set out on a campaign against the Byzantines, and on his way back he turned aside to Damascus (4).

In 216 AH he once again advanced against Byzantine territory and equipped his brother al-Muʿtasim, who captured a number of fortresses.

At the beginning of 217 AH he entered Egypt and killed Abdus al-Fihri, who had seized control of it. He then moved toward Adana, advanced to the fortress of Luʾluʾa (5), besieged it for one hundred days, and finally withdrew (6).