Protests against the Syrian government and violence had been ongoing in the Syrian city of Deir ez-Zor since March 2011, as part of the wider Syrian Civil War, but large-scale clashes started following a military operation in late July 2011 to secure the city of Deir ez-Zor. The rebels took over most of the province by late 2013, leaving only small pockets of government control around the city of Deir ez-Zor.
Hajin is a small city in eastern Syria, administratively part of the Deir ez-Zor Governorate, located along the Euphrates River, south of Deir ez-Zor. Nearby localities include al-Abbas to the west, al-Ramadi to the south and Gharanij to the north. According to the Syria Central Bureau of Statistics, Hajin had a population of 37,935 in the 2004 census. It is the administrative center of a nahiyah ("subdistrict") of the Abu Kamal District. The Hajin subdistrict consists of four towns which had a collective population of 97,970 in 2004. The al-Shaitat tribe is the largest tribe in the area. The town was captured by the Syrian Democratic Forces on 14 December 2018 in the Battle of Hajin, after a week and a half of heavy clashes and intense airstrikes by the United States-led Combined Joint Task Force – Operation Inherent Resolve international coalition, and has since been part of the Autonomous Administration of North and East Syria.
The Syrian Democratic Forces (SDF) is a Kurdish-led coalition formed by ethnic militias and rebel groups, and serves as the official military wing of the Autonomous Administration of North and East Syria (AANES). The SDF is allied to and supplied by the United States–led CJTF–OIR international alliance. Founded in 10 October 2015, the SDF claims that its mission is fighting to create a secular, democratic and federalised Syria. The SDF is opposed by Turkey, who claims the group has direct links to the PKK, which it recognizes as a terrorist group.
The Forces of the Brave, generally called the al-Sanadid Forces, are a militia formed by the Arab Shammar tribe to fight against the Islamic State. Even though the tribe's Syrian strongholds are mostly in the Jazira Canton of the Autonomous Administration of North and East Syria, such as at al-Yaarubiyah and Tell Hamis, the militia operates throughout most of the AANES. The red colour in their flag represents blood while the yellow represents the light, calling themselves “marchers on the red death”. The al-Sanadid Forces are affiliated with the co-governor/co-president of Jazira Canton and tribal leader Humaydi Daham al-Hadi, and are led by Humaydi's son Bandar al-Humaydi.
The Deir ez-Zor offensive (2016) was an ISIL military operation, during which it took over the northern suburbs of Deir ez-Zor on 16 January 2016, and killed from 135 to 300 people, while also kidnapping about 400 others.
The Raqqa campaign was a military operation launched in November 2016 during the Rojava–Islamist conflict by the Syrian Democratic Forces (SDF) against the Islamic State of Iraq and the Levant (ISIL) in the Raqqa Governorate, with the goal of isolating and eventually capturing the Islamic State's capital city, Raqqa. The SDF's subsidiary goals included capturing the Tabqa Dam, the nearby city of al-Thawrah, and the Baath Dam further downstream. The campaign ended successfully in October 2017, with the capture of Raqqa.
The Deir ez-Zor offensive was a military operation launched by the Islamic State of Iraq and the Levant (ISIL) against the Syrian Armed Forces, to capture the city of Deir ez-Zor, on 14 January 2017. The offensive came amid the group losing large amounts of territory in the Raqqa offensive as well as the Turkish military intervention in Syria, while Iraqi forces were advancing in its Iraq headquarters in Mosul. It ended with the city being split into two parts.
The siege of Deir ez-Zor was a large-scale siege imposed by the Islamic State of Iraq and the Levant (ISIL) against several districts in the city of Deir ez-Zor held by the Syrian Army, in an attempt to capture the city and secure full control of the Deir ez-Zor Governorate. The ISIL siege of the city lasted for almost 3 years and 2 months, after which the Syrian Army launched a successful offensive that fully recaptured the city nine weeks later.
The Raqqa Hawks Brigade, also known as Raqqa Falcons Brigade, is a primarily Arab militia, composed mostly of Raqqa natives, that is part of the Syrian Democratic Forces (SDF) and fights against the Islamic State of Iraq and the Levant (ISIL). The unit's stated goal was to recapture its home city from ISIL, which it achieved by taking part in the Battle of Raqqa (2017). The Raqqa Hawks are considered to have sympathies for and connections with Bashar al-Assad's government.
The Northern Democratic Brigade is a Free Syrian Army unit that is closely allied to the Syrian Kurdish YPG and YPJ in Afrin Region since 2014. Led by Absi Taha, Alexander Khalil, and Alexander Alaa, it also joined the Syrian Democratic Forces (SDF) in November 2015. The initial members of the group originated from Jabal Zawiya in Idlib, and it has recruited Arabs from Idlib, Aleppo, and other cities in northern Syria since allying with the YPG. Since joining the SDF, the unit has begun to operate across much of northern and eastern Syria, participating in operations against anti-SDF Syrian opposition factions, the Islamic State of Iraq and the Levant, the Turkish Armed Forces, and the Syrian National Army.
The Central Syria campaign, known as "Operation Khuzam", or "Lavender", was a large-scale military operation of the Syrian Army (SAA) against the Islamic State of Iraq and the Levant (ISIL) during the Syrian Civil War. Its goal was to capture the strategic oil town of Al-Sukhnah, and besiege and capture 11,000 square kilometers of ISIL territory in central Syria, after which the Syrian Army would advance towards Deir ez-Zor, and lift the three-year ISIL siege of the government's enclave in the city. Afterwards, the Syrian Army advanced towards the Islamic State's then-capital of Mayadin.
The Deir ez-Zor campaign, codenamed the al-Jazeera Storm campaign, was a military operation launched by the Syrian Democratic Forces (SDF) against the Islamic State of Iraq and the Levant (ISIL) in Syria's Deir ez-Zor Governorate in 2017 during the Syrian Civil War with the goal of capturing territory in eastern Syria, particularly east and north of the Euphrates river. The U.S.-led Combined Joint Task Force – Operation Inherent Resolve (CJTF–OIR) anti-ISIL coalition provided extensive air support while SDF personnel composed the majority of the ground forces; OIR special forces and artillery units were also involved in the campaign.
The 2017 Euphrates Crossing offensive was a military offensive launched by the Syrian Arab Army against members of the Islamic State of Iraq and the Levant (ISIL) in the Deir ez-Zor Governorate, following the breaking of the three-year siege of the city of Deir ez-Zor. The Euphrates Crossing offensive, conducted by government troops, was done with the aim of denying US-backed Syrian Democratic Forces and the US itself leverage over the Syrian government.
The Deir ez-Zor offensive was a military operation launched by the Syrian Armed Forces to completely expel the Islamic State of Iraq and the Levant (ISIL) from the city of Deir ez-Zor, a provincial capital, located on the banks of the Euphrates river. From 2014 until 2017, the city had been divided into Syrian government and ISIL-controlled halves. The rest of the Governorate (province) was under ISIL control for most of this time, putting the government-controlled half of the city under siege.
The Eastern Syria campaign of September–December 2017 was a large-scale military operation of the Syrian Army (SAA) and its allies against the Islamic State of Iraq and the Levant (ISIL) during the Syrian Civil War. Its goal was to clear the city of Deir ez-Zor of any remaining ISIL forces, capture ISIL's de facto capital of Mayadin, as well as seize the border town of Abu Kamal, which became one of ISIL's final urban strongholds by the latter stages of the campaign.
The Baqir Brigade, named after Shia Imam Muhammad al-Baqir, is a Syrian loyalist militia originating in the Aleppo Governorate that fights in the Syrian Civil War. One of the most prominent and largest pro-government militias from the Aleppo area and part of the "Local Defence Forces" network, the Baqir Brigade mostly consists of tribesmen from the al-Baggara tribe that traditionally supported the rule of the al-Assad family despite being mostly Sunni Muslim. Though the militia's fighters thus come from a largely Sunni background, many of them have converted to or are at least strongly influenced by Shia Islam. Indeed, the Baqir Brigade has been noted for its strong connections to the Lebanese Hezbollah, Iran, and various Iraqi Shia militias, and is thus generally considered to be a Shia or "Shi'ified" fighting force.
The Deir ez-Zor offensive (2018) was launched by the Islamic State of Iraq and the Levant against government-held areas throughout the Deir ez-Zor Governorate of Eastern Syria. During the offensive, on 8 June, ISIL managed to penetrate the city of Abu Kamal, capturing several parts of it.
The Syrian Desert campaign is a campaign waged by Syrian government forces and their allies, including Iran and Russia, against the remaining forces of the Islamic State (IS) in the Syrian Desert region.
Rashid Abu Khawla, also known as Ahmed al-Khbeil, is a former commander in the Syrian Democratic Forces and former Syrian Opposition leader based in Deir ez-Zor.
Syrian government 
Hezbollah 
PMF-affiliated militias
Iran 
Russia (2015–2017)
Iraq (2017–2019)
Rojava (2016–2019)
CJTF–OIR (2017–2019)
Islamic State 
Salafist groups (2011–2014)
Tahrir al-Sham (2019) [3] 
