Counter-IED Report article: Improvised chemical munitions in Syria, January 2017-August 2018

ARES Researcher Galen Wright and Director N.R. Jenzen-Jones authored an article which was published in the latest edition of the Counter-IED Report.

The Syrian government has made extensive use of improvised munitions delivering a chemical payload over the course of the civil war, with incidents involving re-purposed toxic industrial chemicals (TIC) substantially outnumbering those committed with military-purpose chemical agents. The majority of incidents have involved either craft-produced rockets known as improvised rocket-assisted munitions (IRAMs) or helicopter-dropped improvised air-delivered munitions (IADMs), both delivering a payload of industrial chlorine gas. Through 2017-2018, munitions of both types reached a design equilibrium, exhibiting consistent technical characteristics that distinguished them from earlier generations (see Figures 1.1 and 1.2).

Figure 1.1 TIC IRAM as used by Syrian Government forces, 2017-18 (source: ARES).

In both munition types, the designs which have emerged share several broad characteristics. These may point to the tactical requirements and practical constraints driving the Syrian government’s chemical weapons program. Both designs are relatively unsophisticated, simplifying their production and use. The munitions are made with basic tooling to very low tolerances, and with no extraneous components. Chlorine gas is the chemical agent of choice, likely for logistical reasons. As a chemical agent, chlorine is easy to procure or produce industrially, has a variety of plausible legitimate uses (e.g. water purification), and chlorine production and use forms part of the industrial backbone of Syrian infrastructure.

Figure 1.2 TIC IADM as used by Syrian Government forces, 2017-18 (source: ARES).

Both designs have limited battlefield value. This can be attributed to the typically mild effects of chlorine, as well as the weapons’ lack of accuracy. Nonetheless, the true value of these weapons to the Assad regime lie in their ability to instil terror. It is also noteworthy that two separate branches of the Syrian armed forces – the Syrian Arab Army and the Syrian Arab Air Force – have both delivered chlorine attacks, further supporting the well-established pattern of chemical weapons usage by the Syrian government.

The full article is available via Issu. E-book, PDF, and print copy subscriptions to C-IED Report are available via their website.


Remember, all arms and munitions are dangerous. Treat all firearms as if they are loaded, and all munitions as if they are live, until you have personally confirmed otherwise. If you do not have specialist knowledge, never assume that arms or munitions are safe to handle until they have been inspected by a subject matter specialist. You should not approach, handle, move, operate, or modify arms and munitions unless explicitly trained to do so. If you encounter any unexploded ordnance (UXO) or explosive remnants of war (ERW), always remember the ‘ARMS’ acronym:

AVOID the area
RECORD all relevant information
MARK the area from a safe distance to warn others
SEEK assistance from the relevant authorities