Opposition–Islamic State conflict during the Syrian civil war

Opposition–ISIL conflict during the Syrian Civil War
Part of the Syrian Civil War and al-Qaeda–Islamic State conflict
Date2 January 2014 – c.2018
(4 years)
Location
Status Syrian opposition victory
Belligerents

Free Syrian Army
Support:


Nour al-Din al-Zenki Movement
(2014–18)


Syrian Liberation Front

Ahrar ash-Sham
(2014–18)
Jaysh al-Islam
Mujahideen Army (Syria) (until 2017)
Support:

Hay'at Tahrir al-Sham (2017–18)
Al-Qaeda

Support

 Islamic State of Iraq and the Levant

Commanders and leaders

Albay Ahmed Berri
(FSA Chief of Staff)


Zahran Alloush 
(Islamic Front Military leader)
Ahmed Abu Issa (former)
(Islamic Front leader)

Abu Khaled al-Suri 
(Ahrar ash-Sham senior leader)

Abu Mohammad al-Julani
(al-Nusra Front leader)
Sami al-Oraydi
(Deputy of the al-Nusra Front)
Abu Humam al-Shami 
(al-Nusra Military Chief)

Abu Maria Al-Qahtani
(al-Nusra Emir of the Eastern area)
Abu Bakr al-Baghdadi 
Abu Ali al-Anbari  (Emir of Syria)
Abu Ayman al-Iraqi 
(Head of military council)
Abu Omar al-Shishani 
(ISIL field commander)
Haji Bakr 
(Senior ISIL commander)
Abu Baraa al-Jazairi 
(Emir of Saraqeb)
Abu Dajana 
(Emir of Deir ez-Zor)
Abu Mohammad Al-Massri 
(Emir of Manbij)
Abu Haidara Al-Tounisi 
(eastern Qalamoun leader)
Strength

Free Syrian Army 40,000–50,000 Army of Mujahedeen 5,000–12,000

Ajnad al-Sham Islamic Union 15,000


Islamic Front 40,000–70,000

Al-Nusra Front 20,000

Jund al-Aqsa 1,000
ISIL 31,000–100,000
Casualties and losses
2,764+ killed 2,196+ killed
605 civilians killed
76 unidentified killed
an additional 1,200 combatants and 150 civilians estimated killed
Total: 5,641–6,991 killed
(up until 28 June 2014)

Opposition–ISIL conflict during the Syrian Civil War started after fighting erupted between Syrian opposition groups and the Islamic State of Iraq and the Levant (ISIL). In early January 2014, serious clashes between the groups erupted in the north of the country. Opposition groups near Aleppo attacked ISIL in two areas, Atarib and Anadan, which were both strongholds of the fundamentalist Sunni organization. Despite the conflict between ISIL and other rebels, one faction of ISIL has cooperated with the al-Nusra Front and the Green Battalion (a group of Saudi fighters) to combat Hezbollah in the Battle of Qalamoun. By 2018.