The Qalamoun Shield Forces (Arabic: Quwat Dir’ al-Qalamoun, short: QSF) are a militia formed by natives of the Qalamun Mountains that fight for the Assad government during the Syrian Civil War. Originally a small auxiliary and self-defense group, QSF grew into relatively large and well-equipped paramilitary force that operates nationwide. Currently led by Firas Jaz'ah, the Qalamoun Shield Forces are closely affiliated with the 3rd Armoured Division.
The origins of the Qalamoun Shield Forces lie in a small militia of the same name that was set up in al-Nabek after its capture from rebels during the Battle of Qalamoun (2013). Formed by "notables, retired officers and other locals" on 9 January 2014, this unit was designated as auxiliaries to the Republican Guard and was supposed to secure areas retaken from rebel groups. A Damascus native named Adel Ibrahim Dellah eventually became commander of the group. In course of 2015, the nascent QSF had significantly grown in numbers (claiming hundreds of members) and expanded its operations: Fighting at the side of the Republican Guard, the militia not only took part in further offensive operations in the western Qalamoun mountains, but also fought in the wider Rif Dimashq Governorate such as at Harasta. Later into the year, the Qalamoun Shield Forces even sent fighters to take part in the Battle of Aleppo and the Homs offensive (November–December 2015) against ISIL. During these operations, the group began to closely cooperate with the 3rd Armoured Division, leading to the Qalamoun Shield Forces' loyalties shifting away from the Republican Guard.