Direct proof of use
Armament Research Services identified O-10 HE-FRAG submunitions and 3M15 rocket-motor remnants in Damascus-area imagery as evidence that at least some documented remnants came from the 3O8 rocket-assisted cargo projectile. ARES described the 3O8 as the cargo member of the Soviet 240 mm rocket-assisted mortar-projectile family for the 2S4 Tyulpan and M-240 heavy mortars, and assessed the Syrian Civil War munitions as most likely employed by Syrian Arab Army forces.
Human Rights Watch separately documented a 13 December 2015 attack in Douma involving a ground-launched 240 mm 3O8 projectile carrying O-10 submunitions. HRW attributed recent ground-fired cluster-munition attacks to Russian or Syrian government forces, while The Monitor later summarized that a ground-fired 240 mm 3-O-8 rocket-assisted mortar projectile appeared in Syria after Russia began joint operations with Syrian government forces in September 2015.
Sources: ARES 3O8 Syria Identification, HRW December 2015 Cluster Munitions, The Monitor Syria Cluster Munition Ban Policy
Timeline of documented appearances
The first public 3O8 identification in Syria centered on late-2015 Damascus-area evidence. ARES published its technical identification on 15 December 2015, noting O-10 submunitions, a 3M15 rocket motor, and a 3Ch20 brake ring shown in Damascus imagery from November 2015.
HRW's December 2015 report listed the 3O8/O-10 combination among seven cluster-munition types documented since the start of the Russian-Syrian joint offensive on 30 September 2015. HRW then reported unexploded O-10 submunitions from a 3-O-8 cluster-munition mortar projectile in Douma after a 27 January 2016 attack. Amnesty International reported further 3O8 remnants in Eastern Ghouta in November 2017, including verified imagery from Douma.
Sources: ARES 3O8 Syria Identification, HRW December 2015 Cluster Munitions, HRW February 2016 Daily Cluster Attacks, Amnesty Eastern Ghouta Cluster Munitions
Role in the conflict
The documented Syrian use was ground-fired cluster-munition fire rather than possession alone. The projectile delivered O-10 fragmentation submunitions over target areas, linking it to fire-support and area-denial roles in pro-government operations around Damascus and Eastern Ghouta.
The exact firing unit is not publicly established in the cited sources. ARES considered Syrian Arab Army employment most likely; HRW and The Monitor describe the broader context as Syrian government and Russian-government operations, with Russian and Syrian forces often using the same aircraft and weapons and frequently operating together.
Sources: ARES 3O8 Syria Identification, HRW December 2015 Cluster Munitions, The Monitor Syria Cluster Munition Ban Policy, Amnesty Eastern Ghouta Cluster Munitions
