| 2011–2014 Deir ez-Zor clashes | ||||||||
|---|---|---|---|---|---|---|---|---|
| Part of the Syrian Civil War | ||||||||
|  Situation in Deir ez-Zor in March 2014 Syrian Government controlOpposition control | ||||||||
| 
 | ||||||||
| Belligerents | ||||||||
|  Liwa Abu al-Fadhal al-Abbas (rebel claim) | 
 
 
 
 al-Okaidat clan (majority) |  Islamic State of Iraq and the Levant (Islamic State of Iraq until April 2013) Supported by: al-Bakkir clan al-Okaidat clan (minority) | ||||||
| Commanders and leaders | ||||||||
|  Maj. Gen. Issam Zahreddine (Republican Guard Brigade 104 commander)  Maj. Gen. Jameh Jameh † (Head of Deir ez-Zor Military Intelligence)  Kifah Moulhem (Battalion commander) |  Mohammad Abboud (SNC commander for eastern Syria)  Abu Alaith (Liwa Ahfad Mohammad commander)  Abu Mohammad al-Julani (leader of al-Nusra Front)  Abu Maria Al-Qahtani (Sharia leader for al-Nusra Front)  Abu Salam Tabsah (al-Nusra Front commander)  Mohammad al-Chati "Abu Hamza" † (leader of Liwa al-Fatihoun min Ard ash-Sham) |  Abu Bakr al-Baghdadi (Caliph of ISIL)  Amer al-Rafdan (ISIL prefect of Deir ez-Zor)  Ali Kmaz † (ISIL field commander) | ||||||
| Units involved | ||||||||
| See Units | See Units |  Military of ISIL | ||||||
| Strength | ||||||||
| 9,000 soldiers and policemen, 150+ tanks | 17,000 fighters (opposition claim, all withdrawn) | 3,000+ fighters | ||||||
Syrian Government control
Stalemate and ISIL offensive:
 Free Syrian Army/SNC-aligned units
 Free Syrian Army/SNC-aligned units
 Mujahideen and Islamists
 Mujahideen and Islamists