Harakat Ahrar al-Sham al-Islamiyya, commonly referred to as Ahrar al-Sham, is a coalition of multiple Islamist and Salafist units that coalesced into a single brigade and later a division in order to fight against the Syrian Government led by Bashar al-Assad during the Syrian Civil War. Ahrar al-Sham was led by Hassan Aboud until his death in 2014. In July 2013, Ahrar al-Sham had 10,000 to 20,000 fighters, which at the time made it the second most powerful unit fighting against al-Assad, after the Free Syrian Army. It was the principal organization operating under the umbrella of the Syrian Islamic Front and was a major component of the Islamic Front. With an estimated 20,000 fighters in 2015, Ahrar al-Sham became the largest rebel group in Syria after the Free Syrian Army became less powerful. Ahrar al-Sham and Jaysh al-Islam are the main rebel groups supported by Turkey. On 18 February 2018, Ahrar al-Sham merged with the Nour al-Din al-Zenki Movement to form the Syrian Liberation Front.
The Suqour al-Sham Brigades, also known as the Sham Falcons Brigades, is an armed rebel organisation formed by Ahmed Abu Issa early in the Syrian Civil War to fight against the Syrian Government. It was a member of the Islamic Front and a former unit of the Free Syrian Army and the Syrian Islamic Liberation Front. They have a history of coordinating with Ahrar al-Sham and al-Qaeda's al-Nusra Front, though clashes with the latter broke out in January 2017. In March 2015, the Suqour al-Sham Brigades merged with Ahrar ash-Sham, but left Ahrar al-Sham in September 2016. Also, in September 2016, they joined the Army of Conquest which Ahrar al-Sham is also a member. On 25 January 2017, Suqour al-Sham rejoined Ahrar al-Sham, but later became independent.
Syrian Liberation Front is a Syrian Islamist rebel group that was formed in early 2018. and is based out of the Aleppo Governorate in northwestern Syria.
The inter-rebel conflict during the Syrian Civil War has continued throughout the Syrian Civil War as factions of the Syrian opposition and Free Syrian Army have fought each other, with shifting alliances among various Islamist factions such as Jabhat al Nusra, Ahrar al-Sham, Jaysh al-Islam and the Islamic Front.
Liwa al-Haqq, is a Syrian Islamist rebel group that was active during the Syrian Civil War until joining Hayat Tahrir al-Sham in 2017.
The Free Men of Syria Brigade or the Free Syrian Brigade is a group of Syrian rebel fighters affiliated with the Free Syrian Army active during the Syrian civil war, mainly around Aleppo.
Jabhat Ansar al-Din is a jihadist alliance that announced itself on 25 July 2014, during the Syrian Civil War. The alliance contains two groups: Harakat Sham al-Islam and Harakat Fajr ash-Sham al-Islamiya; it had declared that was not affiliated with any other "parties". The Green Battalion was originally a signatory, but around October 2014, it swore allegiance to the leader of Jaish al-Muhajireen wal-Ansar and was integrated into that faction. The alliance had attempted to maintain neutrality in the conflict between ISIL and other groups. On January 28, 2017, it joined with numerous other factions to form Tahrir al-Sham, though portions of it left HTS in February 2018.
The Nour al-Din al-Zenki Movement was a Sunni Islamist rebel group involved in the Syrian Civil War. In 2014, it was reportedly one of the most influential factions in Aleppo, especially the Western Aleppo countryside. Between 2014 and 2015, it was part of the Syrian Revolutionary Command Council and recipient of U.S.-made BGM-71 TOW anti-tank missiles. The Movement made multiple attempts to merge with the larger Islamist rebel group Ahrar al-Sham but were refused by Ahrar al-Sham's leadership. The Zenki Movement also made attempts to merge with other Islamist factions, Jaysh al-Islam and the Sham Legion. However, all merging efforts with these groups failed, leading to the Zenki Movement joining the Salafi Islamist Hayat Tahrir al-Sham (HTS) in 2017. But after a few months the group left HTS and within a year went to war with HTS by joining the Turkish-backed Syrian Liberation Front alongside Ahrar al-Sham on 18 February 2018. After a series of clashes in early 2019 Al Zenki were largely defeated by HTS, expelled to Afrin and absorbed in the Turkish-backed Syrian National Army. However, it reportedly re-emerged as an independent entity in 2020.
The Levant Front is a Syrian rebel group based around Aleppo involved in the Syrian Civil War. It was formed in December 2014.
The Fastaqim Kama Umirt Union is a rebel group active during the Syrian Civil War.
The Army of Conquest or Jaish al-Fatah, abbreviated JaF, was a joint command center of Sunni Islamist Syrian rebel factions participating in the Syrian Civil War.
Fatah Halab, or Aleppo Conquest, was a joint operations room of Syrian rebel factions operating in and around Aleppo, Syria. Succeeding the Aleppo Liberation operations room, its establishment was announced on 26 April 2015. It stated that its aim was to conquer Aleppo City from Syrian government forces.
Hay'at Tahrir al-Sham (HTS), commonly referred to as Tahrir al-Sham, is a Sunni Islamist political and armed organisation involved in the Syrian Civil War. It was formed on 28 January 2017 as a merger between Jaysh al-Ahrar, Jabhat Fateh al-Sham (JFS), Ansar al-Din Front, Jaysh al-Sunna, Liwa al-Haqq, Nour al-Din al-Zenki Movement and. The unification process was held under the initiative of Abu Jaber Shaykh, an Islamist commander who had been the second Emir of Ahrar al-Sham.
Hashim al-Shaykh, also known by his nom de guerreAbu Jaber Shaykh is a rebel commander during the Syrian Civil War who is a senior leader of Tahrir al-Sham. He had reportedly resigned from his position in Ahrar al-Sham where he served as a senior commander to help command and direct the merger. Abu Jaber is a Salafist Muslim with a jihadist ideology, which is reflected in the ideology of the group he leads.
On 19 February 2018, heavy clashes erupted between the newly established Syrian Liberation Front, which consists of Ahrar al-Sham and the Nour al-Din al-Zenki Movement, backed by the Suqour al-Sham Brigades, and Hayat Tahrir al-Sham (HTS) in the western Aleppo Governorate. The conflict soon spread to the Idlib Governorate and the SLF captured several towns from HTS. A ceasefire between the two groups was reached on 24 April 2018. Fighting again resumed on 1 January 2019, ending with a total HTS military victory on 9 January.
The National Front for Liberation is a Syrian rebel coalition that is part of the Syrian National Army (SNA) fighting in the Syrian Civil War. The group was formed by 11 rebel factions in northwestern Syria in May 2018, and was officially announced on 28 May 2018. The formation receives major support from Turkey. The group joined the SNA on 4 October 2019.
Jaysh al-Ahrar, is an armed Sunni Islamist rebel group in northwestern Syria that originated as a clique composed of 16 units in Ahrar al-Sham that opposed involvement in Operation Euphrates Shield, after a fatwa was released by religious clerics in Jabhat Fatah al-Sham, which led to the group's separation from Ahrar al-Sham.
The Leon Sedov Brigade was a Syrian Third camp Trotskyist militant group in the area of Aleppo. Although its founders were Argentinian foreign fighters, the overwhelming majority of its members were local industrial workers and, due to its stance against foreign involvement in the Syrian civil war, was solely funded by members' wages and ran by officers elected by them. It is named for Leon Sedov, the first son of Leon Trotsky. It is the military wing of the International Leninist Trotskyist Fraction and thus shares its basic positions of opposing both Salafi jihadist groups and pro-Western liberal Free Syrian Army factions as counter-revolutionary, and all foreign involvement in the Syrian civil war as imperialist.
The National Front for Liberation–Tahrir al-Sham conflict began on 1 January 2019 during clashes between Nour al-Din al-Zenki Movement and Hayat Tahrir al-Sham (HTS), after HTS launched an attack against the group in Darat Izza, Taqad, and Khan al-Asal fronts in rebel-held western Aleppo. The conflict ended on 10 January 2019, after the National Front for Liberation agreed to withdraw, allowing HTS to take over almost all of the remaining opposition-held areas of the Idlib pocket.
The Insurgency in Idlib is an ongoing insurgency in rebel-held areas in the Idlib Governorate between multiple factions ranging from supporters of the Syrian government to Syrian opposition elements to supporters and members of the Islamic State of Iraq and the Levant (ISIL). The insurgency has been marked by assassinations and bombings, as well as armed confrontations with small arms and raids.
Ahrar al-Sham [1] 
Syrian Liberation Front 
National Front for Liberation