Syrian civil war

On 8 December 2024, insurgent forces entered Damascus and the government of Bashar al-Assad collapsed, bringing to an end more than five decades of Assad family rule and closing the central chapter of the Syrian civil war that began in 2011. The speed of the final offensive stunned many observers, especially after years in which the government appeared militarily secure with Russian and Iranian backing. The fall of Damascus radically altered Syria’s political landscape and reshaped regional calculations, but it did not erase the war’s legacy of mass killing, displacement, destruction, and social fragmentation. Instead, it marked the beginning of a new and uncertain post-Assad phase built on the ruins of a prolonged civil conflict.

An airstrike near Balyun in Idlib province on 27 February 2020 killed dozens of Turkish soldiers, provoking one of the sharpest direct confrontations between Turkey and the Syrian government during the war. Ankara responded by launching Operation Spring Shield, using drones, artillery, and other assets against Syrian government targets in an effort to halt the regime’s offensive in the northwest. The escalation demonstrated how Idlib had become the war’s last major rebel enclave and a dangerous collision point for Syrian, Turkish, Russian, and insurgent interests. The episode also emphasized that, nearly nine years after the uprising began, the conflict still had the potential to widen dramatically through interstate confrontation.

In a nighttime U.S. special operations raid on 26–27 October 2019 near the village of Barisha in Idlib province, ISIS leader Abu Bakr al-Baghdadi was killed. His death was a significant milestone in the Syrian theater because it demonstrated both the enduring presence of jihadist networks in the northwest and the continued centrality of Syria to international counterterrorism operations. Although ISIS had already lost most of its territory, Baghdadi’s killing underscored that the group remained an insurgent threat rather than a vanished one. The raid also highlighted the crowded, volatile battlespace in northwestern Syria, where rival insurgents, foreign powers, and local civilians coexisted uneasily.

On 17 October 2017, the Syrian Democratic Forces announced they had taken Raqqa, the de facto Syrian capital of ISIS. The city’s fall was a major military and symbolic defeat for the group, whose project of territorial rule had depended heavily on Raqqa as an administrative, propaganda, and coercive center. The battle, backed by intensive coalition airpower, left large parts of the city destroyed and added to the immense civilian suffering associated with anti-ISIS operations. Even so, the capture marked a decisive stage in the dismantling of ISIS’s territorial caliphate and elevated the SDF as one of the most important armed actors in northern and eastern Syria.

A chemical attack struck the town of Khan Shaykhun in Idlib province on 4 April 2017, killing dozens of civilians and reviving global alarm over the continued use of banned weapons in Syria. Images of victims, including many children, circulated rapidly and prompted new investigations and diplomatic confrontation. The attack reinforced the sense that earlier international arrangements over Syria’s chemical arsenal had failed to prevent further atrocities. It also triggered direct U.S. military retaliation days later, underscoring how chemical weapons incidents could abruptly alter the pace of foreign involvement in the war. For many observers, Khan Shaykhun showed that impunity remained a central feature of the conflict.

By 22 December 2016, after weeks of assault and negotiated evacuations, Syrian government forces had fully regained eastern Aleppo from rebel groups. The fall of Aleppo was among the most consequential government victories of the war. It crushed the opposition’s strongest urban bastion, reaffirmed the value of Russian and Iranian backing for Damascus, and signaled that Assad had regained the strategic initiative. The humanitarian toll was immense, with civilians enduring siege, bombardment, shortages, and displacement. Internationally, Aleppo became a symbol of the war’s brutality and of the inability of diplomacy to protect besieged populations in one of the conflict’s most devastated cities.

Russia began airstrikes in Syria on 30 September 2015, intervening directly to support the Syrian government. The move was one of the war’s most important turning points because it bolstered Assad at a moment when his forces were under severe pressure and reshaped the military balance. Russian airpower, advisers, and logistical backing helped the government regain momentum in several theaters, while also deepening tensions with Western and regional states over targeting and civilian harm. Moscow’s intervention ensured that the conflict would be decided not only by Syrian actors, but also by the strategic calculations of powerful external sponsors.

On 23 September 2014, the United States, joined by Arab allies, launched airstrikes in Syria against ISIS targets. This intervention opened a new major international front inside the civil war. Unlike earlier diplomatic pressure and limited aid to some opposition groups, the air campaign brought direct and sustained military action by a U.S.-led coalition on Syrian territory. The strikes aimed to weaken ISIS infrastructure, training sites, and leadership, but they also illustrated how the Syrian conflict had become inseparable from broader regional security concerns. From that point forward, Syria was not only a domestic civil war but also a theater of overlapping foreign interventions.

On 29 June 2014, the jihadist organization ISIS declared a caliphate over territory it controlled in Syria and Iraq, dramatically altering the Syrian war. The proclamation reflected the group’s rapid expansion from an insurgent actor into a transnational proto-state that governed populations, controlled resources, and drew recruits from around the world. In Syria, ISIS’s rise complicated an already multilayered conflict by turning rebel groups against one another, threatening Kurdish areas, and shifting international priorities toward counterterrorism. The caliphate declaration also helped internationalize the war further, prompting intensified military responses by regional and global powers.

In the early hours of 21 August 2013, rockets carrying a nerve agent struck opposition-held suburbs in the Ghouta area east of Damascus, killing hundreds and horrifying global audiences. The attack became one of the most infamous episodes of the Syrian civil war and intensified international debate over foreign intervention, accountability, and the regime’s use of chemical weapons. Survivors described suffocation, convulsions, and chaotic efforts by overwhelmed medics to save families in makeshift clinics. The event pushed Syria’s chemical weapons program to the center of international diplomacy and left a lasting moral and legal stain on the conflict.

The battle for Aleppo began in July 2012 and became one of the war’s defining campaigns. As rebels moved into Syria’s largest city and commercial hub, the conflict entered a prolonged phase of urban warfare fought street by street across densely populated neighborhoods. Control of Aleppo mattered militarily, economically, and symbolically: whoever held the city could claim momentum in the struggle for the country’s future. The battle drew in a widening array of rebel factions, government forces, and later foreign backers, while civilians endured bombardment, siege conditions, and mass displacement. Aleppo’s destruction came to embody the devastation of the wider war.

By mid-June 2012, the scale and intensity of the fighting had escalated so dramatically that international observers openly described Syria as being in a state of civil war. This was more than a semantic shift: it reflected the collapse of hopes that the crisis would remain a limited protest movement or be resolved quickly through concessions. Government forces were using heavier weapons, opposition fighters were controlling pockets of territory, and sectarian and regional dimensions were becoming more pronounced. The recognition that Syria had entered full civil war underscored both the conflict’s durability and the mounting humanitarian catastrophe already taking shape.

On 29 July 2011, defected Syrian military officers announced the creation of the Free Syrian Army, a major milestone in the conflict’s shift from uprising to armed rebellion. The new formation aimed to protect demonstrators and oppose the government militarily, giving a loose structure and symbol to the armed opposition. Although the anti-Assad movement remained highly fragmented, the FSA’s emergence signaled that parts of the regular armed forces were breaking away and that the conflict was entering a more sustained and organized military phase. This development accelerated defections, intensified clashes, and deepened the war’s national scope.

Demonstrations that began on 15 March 2011 in the southern city of Daraa marked the opening phase of what became the Syrian civil war. Inspired by the wider Arab Spring and fueled by long-standing grievances over repression, corruption, and economic hardship, protesters called for political reform and the release of detainees. The state’s violent response transformed localized unrest into a nationwide uprising. As funerals, arrests, and further protests followed, the confrontation widened beyond Daraa and laid the groundwork for the militarization and fragmentation that would define the conflict for years.