Deir ez-Zor offensive (April–July 2014)

Deir ez-Zor offensive (April–July 2014)
	Part of the Deir ez-Zor Governorate campaign and inter-rebel conflict during the Syrian civil war
	; Deir ez-Zor Frontline by mid-June, 2014
Date	10 April – 14 July 2014; (3 months and 4 days)
Location	Deir ez-Zor Governorate, Syria35°09′20″N 40°25′33″E / 35.1556°N 40.4258°E
Result	Decisive ISIS victory ISIS expells the Syrian rebels and captures most of the province;
Belligerents
Islamic State	Syrian Opposition Al-Nusra Front; Islamic Front; Free Syrian Army Army of Mujahedeen; Syrian Revolutionaries Front; ; Liwa al-Qadisiyah; Liwa 'Umar al-Mukhtar; ;
Commanders and leaders
Abu Bakr al-Baghdadi (Leader of ISIL); Abu Omar al-Shishani (Military Chief); Abu Ayman al-Iraqi (Governor of Deir ez-Zor); Abu Ruqayya al-Ansari	Brig. Gen. Abdul-Ilah al-Bashir; (FSA Chief of Staff); Jamal Maarouf; (SRF Leader); Abu Mohammad al-Julani; (al-Nusra Front Leader); Zahran Alloush; (Islamic Front Military Leader); Ahmed Abu Issa; (Islamic Front Leader); Adnan Bakour †; (Al-Tawhid Brigade Leader); Abu Hussein al-Dik †; (Suqour al-Sham Brigade Leader); Abu Khaled al-Suri †; (Ahrar ash-Sham senior leader)
Casualties and losses
267 killed (10–11 April; 30 April – 10 June)	414 killed (10–11 April; 30 April – 10 June)
	39 civilians killed (30 April – 10 June)

The Deir ez-Zor offensive (April–July 2014) was executed by the Islamic State, also known as ISIS, against all other opposition forces in the Deir ez-Zor Governorate as part of the Inter-rebel conflict during the Syrian Civil War.

After more than three months of heavy fighting, ISIS totally defeated the rebels and captured almost the whole province, except a part of the provincial capital, the military airport on its southern outskirts and a few of the surrounding towns, which remained under control of Syrian Arab Republic government troops, who were not involved in the inter-rebel fighting.