The Syrian opposition was an umbrella term for the Syrian rebel organizations that opposed Bashar al-Assad's Ba'athist regime during the Syrian civil war.
The al-Tawhid Brigade was an armed Islamist insurgent group involved in the Syrian Civil War.
Harakat Ahrar al-Sham al-Islamiyya, commonly referred to as Ahrar al-Sham, was a coalition of multiple Sunni Islamist 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 were 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.
A number of states and armed groups have involved themselves in the Syrian civil war (2011–present) as belligerents. The main groups were the Syrian Ba'athist regime and allies, the Syrian opposition and allies, Al-Qaeda and affiliates, Islamic State, and the Kurdish Syrian Democratic Forces.
The Islamic Front was a Sunni Islamist rebel group involved in the Syrian Civil War, which was formed by the union of seven separate groups on 22 November 2013. Its three largest components were Ahrar ash-Sham, the al-Tawhid Brigade and Jaysh al-Islam. The alliance was achieved by expanding the preceding Syrian Islamic Front alliance. It was described as "an umbrella organization rather than a full union", with constituent factions continuing to serve under their own distinct leaderships.
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 Al-Nusra Front, Ahrar al-Sham, Jaysh al-Islam and the Islamic Front.
The Sham Legion was an alliance of Sunni Islamist rebel groups formed in March 2014, during the Syrian Civil War. The alliance was formed from 19 different groups, some of which were previously affiliated with the Muslim Brotherhood of Syria and the Shields of the Revolution Council.
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.
The Levant Front was a Syrian revolutionary 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 Revolutionaries, also known as Jaysh al-Thuwar, is a multi-ethnic armed Syrian rebel coalition that is allied with the primarily Kurdish People's Protection Units (YPG) and participating in the Syrian Civil War as part of the Syrian Democratic Forces (SDF).
The al-Hamza Division is a Syrian rebel group in northwestern Syria affiliated with the Syrian National Army, trained and equipped by the United States, the United Kingdom and Turkey as part of the Syrian Train and Equip Program. Formed in 2013, it cooperates with the Turkish Armed Forces in the Turkish occupation of northern Syria.
Hay'at Tahrir al-Sham (HTS), also referred to as Tahrir al-Sham, was a Sunni Islamist political organisation and former militia group involved in the Syrian civil war. It was formed on 28 January 2017 as a merger between several armed groups: Jaysh al-Ahrar, Jabhat Fateh al-Sham (JFS), Ansar al-Din Front, Jaysh al-Sunna, Liwa al-Haqq, and the Nour al-Din al-Zenki Movement. The unification process was held under the initiative of Abu Jaber Shaykh, an Islamist militant commander who had been the second emir of Ahrar al-Sham. HTS, along with other Syrian opposition groups, launched an offensive that led to fall of the Assad regime on 8 December 2024.
The Syrian National Army, also known as the Turkish-backed Free Syrian Army (TFSA), was a coalition of armed Syrian opposition groups that participated in the Syrian civil war. Comprising various rebel factions that emerged at the start of the war in July 2011, it was officially established in 2017 under the auspices of Turkey, who provides funding, training, and military support.
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.
Tajammu Ahrar al-Sharqiya, commonly referred to as Ahrar al-Sharqiya, was an armed Syrian rebel group founded in 2016 by individuals exiled and displaced mostly from the Deir ez-Zor Governorate and other eastern provinces, such as the Hasakah Governorate, by ISIL, YPG and the Syrian government due to fighting that took place there between 2011 and 2014. Many fighters in Ahrar al-Sharqiya were former al-Nusra and Ahrar al-Sham members.
Jaysh al-Ahrar, was an armed Salafi 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 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.
Dawn of Freedom Operations Room also known as Fajr al-Hurriya Operations Room is a Syrian militant operations room that is led by the Turkish-backed Syrian National Army during the Syrian civil war, specifically against both the Syrian Arab Army and the Syrian Democratic Forces and their regiments.
The Sultan Suleiman Shah Division, also known as the Suleiman Shah Brigade, is a Turkish-backed faction in Syria during the Syrian civil war.
Syrian National Army [4] 
Syrian Democratic Forces [3] 