The Mu'tasim Division, formerly the Mutasim Brigade is a Free Syrian Army faction active in the northern Aleppo Governorate, based in the town of Mare'. The group was named after al-Mu'tasim, an Abbasid caliph.
The Free Syrian Army faction was founded in 2015 during the Syrian Civil War. The brigade was named after the Abbasid caliph al-Mu'tasim.
The Mu'tasim Brigade supports the political Syrian peace process and trained and equipped by the United States. However, it opposes the US–Russia peace proposals on Syria.
The group called for "freedom and justice" and in 2016, the group had 500 fighters but this number doubled by 2017.